This quick and easy method for dating black Singer Featherweights uses only the 2 letter prefix and the first 2 digits of the 6 digit serial number. 09/23/35 *****transitional production run 221__ AE 05-06 ….. She is an independent professional instructor and lecturer who loves sharing her passion for quilts and history with audiences and workshop participants.Nova’s relaxed style draws her audiences into the lecture and has made her a popular speaker with civic groups as well as quilt guilds. 10/14/53 *****transitional production run 221__ AL 68-73 ….. 05/04/53 *****transitional production run 221__ AL 52-57 ….. 01/22/48 *****limited production run (1000 units) 221K_ EE 57 ………… Using the serial number you can use the charts below to find the date when your machine was given a batch assignment at the factory.If you do not find your machine serial number listed in the charts, then further in the text below will be more references and info.
After this time (serial numbers EP54xxxx and later) the 'Red S' badge was used.
07/19/50 *****transitional production run 221K_ EG 07-08 …..