Steve,
Again, as I replied to your PM:
Sorry Steve, but that is not correct.
The data I have seen on your web site in the past are not from the 'real originals', they are from the transcribed Rouge office ledger copies. I have reviewed all the original records, both the office ledger transcriptions and the shop floor foreman's daily logs numerous times in the last ten years.
Additionally, there is another set of production records in Charles Sorenson's communications files, which specifically document a lot of the details and production figures for engines and cars produced in europe. I have not yet gotten around to organizing and publishing that on my web site.
Unfortunately for engine production, the Archives sends out xeroxes of the secondary office transcriptions, which contain a number of errors and omissions compared to the original daily shop floor logs.
The 20,000 numbers from 4470001 to 4490000 were assigned to Manchester on February 23, 1931 by office administration. It was another month before the Rouge engine operations (shop floor) reached and 'skipped' over that block of numbers in their daily numbering operations (on March 23, 1931). Thus the confusion.
Vince
Model A and B Engine Production Data on Ford Garage