The source is a book published by Singer in 1980 for its reps and dealers and is a photographic record "to provide an easy means of identification of sewing machines sold in the UK from 1870 to 1862" Each model is photographed and with a caption giving dates of manufacture and other details. Black machines produced in Britain from 1949 to 1955 when entire 221K production went over to the pale tourquoise. EZ was used from May '68 to April '70 and FB from April '69 to June '71.As far as I can tell the SNs on British machines did not allow a to-the-day DOB until the 500 series started in 1973.---------------------------- Date: 06 Mar 96 EST From: Graham Forsdyke ([email protected]) Subject: Contribution/To all I"m just a little bit excited about this. From other information in the book I should be able to pin down the date of all K machines if Singer USA do not have the UK information. " Just how faint is that letter A in the SN, Nancy?Have just found burried deep in my archive the definitite answer to thos white/mint-green FWs. ---------------------------- Date: 07 Mar 96 EST From: Graham Forsdyke ([email protected]) Subject: Contribution re DOB of 221K " I have a pale turquoise FW (to me, it will always be mint green) with a SN of F (then a verrry faint "A") 131629. According to the records I'm using which were rescued from Kilbowie when the factory closed, the Singer Co went from EZ to FB without using FA at all.Like Suzy I am rather suspicious about the Singer 800 number dates and also about the 25,000 daily production -- that's over 7 million a year.
A Anderson South Carolina AP Lagos Nigera B Bonnieres France BE Casablanca Morocco BG Bancock Thailand C Campinas Brazil CH Santiago Chili Cy Ratmalana Ceylon E Elizabeth NJ USA F Taytay Phillipines G Karlsruhe Germany GH Tema Ghana H Karachi Pakistan HC Chittigong East Pakistan J St Jaohns Canada K Clydebank Scotland L Bogota Colombia LM Kinshasha Congo M Monza Italy ML Petaling Malaysia N Taichung Taiwan P Penrith NSW Australia PR Lima Peru Q Johannesburg S Africa R Querataro Mexico T Delhi India TN Tunis Tunisia U Utsunomiga Japan V Buenos Aires Argentinia VN Saigon South Vietnam Y Maltepe Turkey Z Alcenon France There were also "factories" in Wurselen in Germany and Alencon in France but I can find no record of designations for them.
According to Singer UK it is not possible to date machines to the day until after 1970 when a code was used within the serial number.
It could well be that batches of numbers were allocated to various factories on a given day (and this is the birthday we get) and used until exhausted when a new batch would be allocated.
Maybe the explanation you were given by Singer predates 1933 or is for machines made later than the 1960's.
Since your example is for 1981, I will guess the latter.