Serial Number Making History Ii Units
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IntroductionThe information below is taken from a Powermatic document that dates from the late 1970s. The original document is cryptic and difficult to understand so we have done our best to clarify the information and correlate it with data from various other sources. A scan of the original document is available here: Powermatic changed their serial numbering system several times over the years, and the timing varied depending on the type of machine. Therefore, interpreting a serial number requires knowledge of the machine type. However, there are some general patterns that are followed by most, though not all serial numbers. Format Years Comments Before 1948 No serial number data. 1948—53 Early machines did not have serial numbers.
Mnnn 1953—55 'm' is a digit that varied according to machine type. 'nnn' is a number. N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5.
'nnnn' is a number. 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. NMM-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NNMM-nnnn 1978—??
'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. In the last two entries above, 'MM' is a two-digit number that identifies the model and is usually—but not always—the same as the model number, e.g., '66' for the Model 66 tablesaw, but '32' for the model 15 mortiser. The above table provides general guidelines but you should double-check against the detailed tables below. ExamplesA Powermatic Model 60 8-inch jointer has. According to the table under 'Jointers', below, the model 60 used the pattern '3nnn' during the period 1957 to 1960. Another Model 60 jointer has, which matches the pattern 'N-nnnn', placing it between 1960 and 1968; 'N' is 8 so this jointer was made in 1968.
A Model 400 hollow-chisel mortiser has. The serial-number table for Mortisers, below, does not have any data for a Model 400. But looking at the general table, above, we tentatively decide that it is of the form 'NMM-nnnn' where MM is either 40 or 400, N is 5, and 'nnn' is 045, implying that the machine is the 45th such machine made in 1975. For this mortiser we would be well advised to use other clues such as the original paint color to verify this date. We can do this by comparing the machine to other machines from 1975 in the Photo Index.
CaveatsPowermatic was inconsistent in following their serial-number patterns: dashes might be omitted, leading zeroes may or may not be present in the 'nnnn' portion of the numbers, and after adopting revised serial number format, they sometimes reverted back to the older pattern for a while. Band Saws, Wood-Cutting Format Years Comments Model 80 N-nnnn 1955—?? 'N' is the units digit of the year, beginning in 195 5. 'nnnn' is a number. Model 81 N-nnnn 1960—68 'N' is the units digit of the year, beginning in 196 0. 'nnnn' is a number. N81-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8.
'nnnn' is a number. NN81-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 140 N-nnnn 1955—?? 'N' is the units digit of the year, beginning in 195 5.
'nnnn' is a number. Model 141 N-nnnn 1961—68 'N' is the units digit of the year, beginning in 195 5.
'nnnn' is a number. N41-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN41-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Band Saws, Metal-cutting Format Years Comments Model 2 N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5.
'nnnn' is a number. N02-nnnn 1968—??
'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. Model 5 N-nnnn 1964—68 'N' is the units digit of the year, beginning in 196 4. 'nnnn' is a number. N05-nnnn 1968—?? 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
Model 6 N06-nnnn 1970—?? 'N' is the units digit of the year, beginning in 197 0. 'nnnn' is a number. Model 8 N-nnnn 1964—68 'N' is the units digit of the year, beginning in 196 4.
'nnnn' is a number. N08-nnnn 1968—?? 'N' is the units digit of the year, beginning in 197 0. 'nnnn' is a number.
Model 83 (Friction cutting) No serial numbers. Model 85 No serial numbers. Model 86 N-nnn 1959—?? 'N' is the units digit of the year, beginning in 195 9. 'nnn' is a number. Model 87 N-nnnn 1960—68 'N' is the units digit of the year, beginning in 196 0. 'nnnn' is a number.
N87-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN87-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 88 N88-nnnn 1974—78 'N' is the units digit of the year, beginning in 197 4.
'nnnn' is a number. NN88-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Model 89 N89-nnnn 1969—?? 'N' is the units digit of the year, beginning in 196 9. 'nnnn' is a number.
Drill Presses Format Years Comments Model 1100 N-nnnn 1955—63 'N' is the units digit of the year, beginning in 195 5. 'nnnn' is a number. Model 1150 N-0nnn 1964—68 'N' is the units digit of the year, beginning in 196 4.
'nnnn' is a number. N15X-nnnn 1968—76 'N' is the units digit of the year, beginning in 196 8. 'X' is the letter V or S.
'nnnn' is a number. Model 1150A N15X-nnnn 1976—78 'N' is the units digit of the year, beginning in 197 6. 'X' is the letter V or S. 'nnnn' is a number. NN15X-nnnn 1978—78 'NN' is the last two digits of the year, beginning in 19 78. 'X' is the letter V or S.
'nnnn' is a number. Model 1200 N-1nnn 1955—64 'nnnn' is a number. NN-nnnn 1965—68 'NN' is the last two digits of the year, beginning in 19 65. 'nnnn' is a number. N20X-nnnn 1968—78 'N' is the units digit of the year, beginning in 197 6.
'X' is the letter V or S. 'nnnn' is a number. NN20X-nnnn 1978—78 'NN' is the last two digits of the year, beginning in 19 78. 'X' is the letter V or S. 'nnnn' is a number. Jointers Format Years Comments Model 50 (6 inch) 11nnn 1955—60 'nnn' is a number. N-nnnn 1960—65 'N' is the units digit of the year, beginning in 196 0.
'nnn' is a number. 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N50-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN50-nnnn 1978—??
'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 60 (8 inch) 3nnn 1957—1960 'nnn' is a number. N-nnnn 1958—67 'N' is the units digit of the year, beginning in 195 8. 'nnnn' is a number.
N61-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN61-nnnn 1978—?? 'NN' is the first two digits of the year, beginning in 19 78. 'nnnn' is a number.
Lathes, Wood Format Years Comments Model 45 N-1nnn 1960—65? 'N' is the units digit of the year, beginning in 196 0. 'nnn' is a number.
6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N45-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN45-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 90 0-nnnn 1955—68 'nnnn' is a number. N90-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN90-nnnn 1978—?? 'NN' is the first two digits of the year, beginning in 19 78.
'nnnn' is a number. Mortisers Format Years Comments Model 2A Chain 1948—53 According to Powermatic this model did not have serial numbers, but we have seen at least one example that did (S/N 2050). Model 15 Chain 2nnn 1953—55 'nnn' is a number. N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5.
Serial Number Making History Ii Units 1
'nnnn' is a number. Model 30 Hydraulic Chain 1955 This model did not have serial numbers. Model 40 Hydraulic Chain 1956—60 This model did not have serial numbers. Model 41 Hydraulic Chain 1960—??
This model did not have serial numbers. Model 5 Hydraulic Hollow Chisel 1955 There is no record of serial numbers for this model. Model 10 Hollow Chisel 2nnn 1948—55 'nnn' is a number. Beginning year (1948) is estimated. N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5.
'nnnn' is a number. 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N40-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN40-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Planers Format Years Comments Model 2A (20 inch) 1930—?? This model did not have serial numbers. Model 3A (24 inch) 1930—??
This model did not have serial numbers. Model 12 (12 inch) 1948—50 This model did not have serial numbers until June 1950. 'nnnn' is a number.
Models CD 16, CE 16, CS 16 (16 inch) 19??—?? These models did not have serial numbers.
Model E 16 (16 inch) nnnn 19??—?? 'nnnn' is a number, beginning with 7001. Model 100 (12 inch) nnnn 1955—55 'nnnn' is a number, beginning with 6200. N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5.
'nnnn' is a number. 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N00-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN00-nnnn 1978—??
'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 160 (16 inch) N-nnnn 1959—67 'N' is the units digit of the year, beginning in 195 9. 'nnnn' is a number. N60-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN60-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 180 (18 inch) N-nnn 1961—68 'N' is the units digit of the year, beginning in 196 1. 'nnn' is a number. N80-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN80-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Model 220 (20 inch) nnnn 1952—55 'nnnn' is a number, beginning with number 5100.
Model 221 (20 inch) N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5. 'nnnn' is a number, beginning with 5525. 6N-nnnn 1965—67 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N22-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8.
'nnnn' is a number. NN22-nnnn 1978—??
'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 224 (24 inch) nnnn 1952—55 'nnnn' is a number, beginning with number 5100. Nnnn 1955—57 'nnnn' is a number, beginning with number 8001. Model 225 (24 inch) nnnn 1957—60 'nnnn' is a number, beginning with number 8360.
N-nnnn 1960—67 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N25-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8.
'nnnn' is a number. NN25-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Sanders Format Years Comments Model 30 N-nnnn 1960—68 'N' is the units digit of the year, beginning in 196 0. 'nnnn' is a number.
N30-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. Model 30A N30Annnn 1969—77 'N' is the units digit of the year, beginning in 196 9. 'nnn' is a number. NN30-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number.
Model 30B N30-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN30-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Model 33 N-nnnn 1960—68 'N' is the units digit of the year, beginning in 196 0. 'nnnn' is a number. N33-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8.
'nnnn' is a number. Model 33B N33-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
NN33-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 35 N-nnnn 1960—68 'N' is the units digit of the year, beginning in 196 0. 'nnnn' is a number.
N35-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. Model 35B N35-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN35-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnnn' is a number. Scroll Saws Format Years Comments Model 95 1948—53 This model did not have serial numbers. N-nnn 1961—68 'N' is the units digit of the year, beginning in 196 1.
'nnnn' is a number. N95-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN95-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number.
Spindle Shaper Format Years Comments Model 25 N-nnnn 1961—65 'N' is the units digit of the year, beginning in 195 5. 'nnnn' is a number. Model 26 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5. 'nnnn' is a number. N26-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number.
Making History Ii Review
NN26-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number.
Tilting Arbor Saw (Tablesaw) Format Years Comments Model 62 N-nnn 1964—68 'N' is the units digit of the year, beginning in 196 4. 'nnn' is a number. N62-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN62-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number.
Model 65 N-nnn 1955—65 'N' is the units digit of the year, beginning in 195 5. 'nnn' is a number. NN-nnn 1965—??
'NN' is the last two digits of the year, beginning in 196 5. 'nnn' is a number. Model 66 66-nnn 1965—68 'nnn' is a number. N66-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8.
'nnnn' is a number. NN66-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 68 N68-nnnn 1972—78 'N' is the units digit of the year, beginning in 197 2.
'nnnn' is a number. NN68-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number. Model 70 1nnn 1954—55 'nnn' is a number. N-nnnn 1955—60 'nnnn' is a number. Model 71 N-nnn 1960—??
'N' is the units digit of the year, beginning in 196 0. 'nnn' is a number, beginning with '600' in 1960.
Model 72 N-nnn 1958—67 'N' is the units digit of the year, beginning in 195 8. 'nnn' is a number. N72-nnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnn' is a number. NN72-nnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78.
'nnn' is a number. Tenoners, Single-End Format Years Comments Model 2 1948—53 This model did not have serial numbers. Model 2A N-nnnn 1955—64 'N' is the units digit of the year, beginning in 195 5. 'nnnn' is a number. 6N-nnnn 1965—68 'N' is the units digit of the year, beginning in 196 5.
'nnnn' is a number. N28-nnnn 1968—77 'N' is the units digit of the year, beginning in 196 8. 'nnnn' is a number. NN32-nnnn 1978—?? 'NN' is the last two digits of the year, beginning in 19 78. 'nnnn' is a number.