To identify and date your sewing machine, look up the serial number on a chart like the free one in. Singer introduced the model 99 electric sewing machine. The simple answer is that pinpointing an exact date for any vintage Singer can be difficult, due to incomplete, conflicting, and contradictory information. But a bit of detective work should help you date your machine to within a 2-3 year period. Serial number and model number are necessary to start the process.
WHITE ROTARY SEWING MACHINE SERIAL NUMBERS. MACHINE SERIAL NUMBERS
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Singer Sewing Machine Model Numbers
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