Dating line numbers
Strangely, it included all "NA" and "NB" serial numbers regardless of model number.
From April 1996 to 2005 Singer Customer Service used the Sewing Machine Blue Book dates of 1953-1959 for all "NA" and "NB" serial numbers.
All sewing machines manufactured their never had a suffix after the model number.
After 1900 all models manufactured overseas now included a suffix after the model number to denote the place of manufacture.
In August 1988 Singer completed the sale of its two South Carolina plants, Pickens and Anderson factories, which had about 2,500 employees total, to Ryobi Limited of Japan. The myth about the Anderson factory closing down in 1959, is simply not true!
(Ryobi Corporation) This was several years after the Elizabethport factory located in Elizabeth, New Jersey closed down on 1 December 1982. The myth about the "A" added because the Anderson factory burned down, is simply not true!
Example would be a 222K, manufactured in Kilbowie, Scotland.
These years are not completely accurate and are only the years of the entire allotted serial numbers; NA-1951, NB-1956 and NC-1961.What this tells us is 1 million "NA" serial numbered sewing machines were manufactured in 1951, 1 million "NB" serial numbered sewing machine were manufactured in 1956 and 1 million "NB" serial numbered sewing machine were manufactured in 1961.Anderson, South Carolina Singer had one United States manufacturing factory, Elizabethport, located in Elizabeth, New Jersey.Because of this confusion and in the best interest to owners Singer in 2011 deleted all the records and changed it to the present-day that offers a facility for consumers to uncover the history of their personal Singer household sewing machine and discover the year it was issued.Singer will issue an acknowledgement certificate that you can print out with your name, serial number and year of issue for all Singer model sewing machines.