Two Digit Dating System for Black Singer Featherweights
Copyright @2007-2009 class221.com. All Rights Reserved. This material is for personal use only.

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.

For purposes of identifying the date when a particular serial number was reserved, it is necessary to decipher the 2 letter prefix and only the first 2 numerals of the serial number.

Example: 221__AD 884639 Ignore the last 4 digits; then lookup 221__ AD 88……3/18/1935.

221__ AD 54-55 ….. 10/03/33
221__ AD 72-73 ….. 09/10/34
221__ AD 78-79 ….. 11/27/34
221__ AD 88-89 ….. 03/18/35
221-1 AD 93-94 ……. 06/24/35
221__ AD 99 ……….. 09/23/35
221__ AE 00 ……….. 09/23/35 *****transitional production run
221__ AE 05-06 ….. 12/30/35
221__ AE 07-08 ….. 03/25/36
221__ AE 20-22 ….. 06/13/36
221__ AE 29-30 ….. 11/05/36
221__ AE 40-42 ….. 03/15/37
221__ AE 53-55 ….. 06/11/37 *****transitional production run
221__ AE 77-79 ….. 12/08/37
221__ AE 97-99 ….. 05/24/38 *****transitional production run
221__ AF 07-09 ….. 10/10/38
221__ AF 16-18 ….. 02/15/39
221__ AF 24-26 ….. 07/11/39
221__ AF 37-39 ….. 12/05/39
221__ AF 47-49 ….. 04/10/40
221__ AF 57-59 ….. 08/15/40 *****transitional production run
221__ AF 74-76 ….. 01/07/41
221__ AF 86-89 ….. 04/01/41
221__ AF 99 ……….. 07/01/41 *****transitional production run
221__ AG 00-01 ….. 07/01/41
221__ AG 52-54 ….. 07/17/45
221-1 AG 60-62 ….. 02/18/46
221-1 AG 68-70 ….. 06/04/46
221__ AG 80-82 ….. 09/16/46
221-1 AG 84-85 ….. 10/25/46
221__ AG 86-88 ….. 11/22/46
221__ AG 97-99 ….. 02/19/47
221-1 AH 05-07 ….. 04/22/47
221-1 AH 11-13 ….. 06/26/47
221-1 AH 19-22 ….. 08/19/47 *****transitional production run
221-1 AH 31-34 ….. 10/28/47
221-1 AH 41-44 ….. 01/22/48
221-1 AH 55-58 ….. 04/20/48
221-1 AH 64-67 ….. 06/18/48
221-1 AH 79-82 ….. 10/01/48
221__ AH 97-99 ….. 12/09/48
221__ AJ 01-03 ….. 12/09/48
221__ AJ 10-14 ….. 03/15/49
221-1 AJ 18-22 ….. 11/18/49
221-1 AJ 34-38 ….. 01/23/50 *****transitional production run
221-1 AJ 55-59 ….. 03/31/50
221-1 AJ 61-65 ….. 06/01/50
221-1 AJ 78-82 ….. 08/22/50
221-1 AJ 88-93 ….. 10/26/50
221-1 AK 07-12 ….. 01/29/51
221__ AK 38-43 ….. 05/10/51
221__ AK 57-62 ….. 10/31/51 *****transitional production run
221__ AK 74-79 ….. 02/20/52
221__ AK 98-99 ….. 08/11/52
221__ AL 00-03 ….. 08/11/52
221__ AL 15-20 ….. 12/12/52
221__ AL 38-43 ….. 05/04/53 *****transitional production run
221__ AL 52-57 ….. 10/14/53 *****transitional production run
221__ AL 68-73 ….. 04/22/54
221__ AL 90-95 ….. 01/17/55
221__ AM 13-18 ….. 06/10/55
221__ AM 36-41 ….. 02/27/56 *****transitional production run
221__ AM 65-70 ….. 01/29/57
221__ AM 77-82 ….. 09/27/57
221K_ EE 15 ……….. 08/25/47 *****limited production run (500 units)
221K_ EE 452-453 … 12/24/47 *****limited production run (500 units)
221K_ EE 458-459 … 01/22/48 *****limited production run (1000 units)
221K_ EE 57 ………… 05/14/48
221K_ EE 80 ………… 09/21/48
221K_ EE 85-86 ….. 12/10/48
221K_ EF 15-16 ….. 05/23/49
221K_ EF 27-28 ….. 08/17/49
221K_ EF 55-56 ….. 11/07/49
221K_ EF 68-69 ….. 02/14/50
221K_ EF 70-71 ….. 04/24/50
221K_ EF 90-91 ….. 07/19/50 *****transitional production run
221K_ EG 07-08 ….. 10/09/50
221K_ EG 30-31 ….. 12/18/50
221K_ EG 34-35 ….. 02/15/51
221K_ EG 43-44 ….. 03/29/51
221K_ EG 63-64 ….. 05/16/51
221K_ EG 95-96 ….. 10/17/51 *****transitional production run
221K_ EH 00-01 ….. 12/18/51
221K_ EH 13-14 ….. 02/29/52
221K_ EH 23-24 ….. 04/28/52
221K_ EH 37-38 ….. 07/22/52
221K_ EH 62-63 ….. 10/08/52
221K_ EH 89-90 ….. 03/04/53 *****transitional production run
221K_ EJ 21 …………. 09/04/53 *****transitional production run
221K_ EK 20-21 ….. 02/14/55
221K_ EK 98-99 ….. 12/20/55
221K_ EL 53-54 ….. 06/13/56
221K_ EM 01-02 ….. 01/04/57
221K_ EM 59-60 ….. 08/02/57
221K_ EN 23 ………… 04/17/58
221K_ EN 82 ………… 10/27/58
221K_ EP 25 …………. 05/18/59 ***** limited production run (1500 units)
221K_ ES 17 …………. 11/03/60
221K_ ES 23-24 …… 01/10/61
221K_ ES 64-65 ….. 05/15/61
221K_ ES 87-88 …… 08/19/61 (contains both black & tan models)
221K_ ET 06-07 ….. 11/02/61
221K_ EV 77-82 ….. 03/03/64 (white/green models only)
221K_ EW 06-07 ….. 08/06/68 (white/green models only)

222K_ EJ 14 ……………. 07/23/53 *****limited production run (100 units)
222K_ EJ 211 ………….. 09/02/53 *****limited production run (150 units)
222K_ EJ 219-220 …….. 09/22/53 *****limited/transitional production run (150 units)
222K_ EJ 223 …………… 10/01/53 *****limited production run (200 units)
222K_ EJ 225-226038 ….. 10/14/53 *****limited production run (200 units)
222K_ EJ 226039-226438 ….. 10/21/53 *****limited production run (400 units)
222K_ EJ 226439-23 ….. 11/18/53 *****limited production run (200 units)
222K_ EJ 26-27 ….. 03/31/54
222K_ EJ 90-91 ….. 09/10/54
222K_ EK 31-32 ….. 03/14/55
222K_ EK 62-63 ….. 08/16/55
222K_ EL 17-18 ….. 03/02/56
222K_ EL 68 ………. 09/17/56
222K_ EM 23 ……… 02/26/56
222K_ EM 60 ……… 08/02/57
222K_ EM 95-96 …. 11/15/57
222K_ EN 13 ……… 03/17/58
222K_ EP 13 ………. 03/03/59 ***** Red S Badge introduced on a few machines
222K_ EP 54 ………. 09/22/59 ***** 1st full production run of Red S Badge
222K_ EP 75-76 ….. 12/18/59
222K_ ER 02 ………. 03/15/60
222K_ ER 31 ………. 05/30/60
222K_ ER 90 ……… 09/07/60
222K_ ES 16 ………. 08/19/60
222K_ ES 35 ……… 01/31/61
222K_ ES 52 ………. 03/30/61

 

Singer manufactured many different models with the same two letter prefix. For instance, every Singer model produced in 1934 at Elizabethport had the same prefix (AD). When a new production run began for a particular model, several thousand serial numbers were reserved for each model. After 1 million serial numbers for a given two letter prefix were reserved, the next alphabetical prefix was begun.

The serial number reservation date is often confused as the actual production date or “birthdate”. For example, the birthdate for 221 AD 789994 is not 11/27/1934, but is sometime between 11/27/1934 and 03/18/1935, when the next production run began for Class 221, Model 221’s at Elizabethport.

Featherweights were produced at three locations:

  • Model 221 Featherweights were produced at Singer’s Elizabethport facility in Elizabeth, New Jersey from 1933 to 1957.
  • Model 221-1 Featherweights were produced at Elizabethport from 1935 to 1951.
  • Model 221K Featherweights were produced at Singer’s Kilbowie facility at Clydebank, Scotland from 1947 to 1961.
  • Model 222K Freearms were produced at Singer’s Kilbowie facility at Clydebank, Scotland from 1953 to 1961.
  • White/Green & Beige/Tan machines were produced at Clydebank, Scotland and St. John’s, Newfoundland, Canada (Beige/Tan) from 1945 to 1963. (JB 1945-1948 JC 1948-1959 JD 1959-1963)

Motors: Models 221 and 221-1 were originally equipped with 110-120 volt motors. Model 221K Featherweights were originally equipped with either 110 volt or 220 volt motors. Except for the motors, the mechanical components of all Class 221 models (221, 221-1, and 221K) were fundamentally unchanged from 1933 through 1961.

 

 

The International Sewing Machine Collectors’ Society (ISMACS) has published a wealth of information about the Singer Featherweight. Detalied information about transitional production runs is available at the ISMACS website.The Singer Sewing Machine Company has published the complete list of serial numbers reserved for each production run of the Featherweight. The exact number of Featherweights actually produced is not known. The data was condensed into the quick and easy Two Digit Dating System by class221.com.

 

Copyright @2007-2009 class221.com. All Rights Reserved. This material is for personal use only.