I checked Orchard & Madden's book "British Forces Motorcycles" and found the
following:
WM2081643:
Contract number: C13290
WD serial number allocation: 4752401-4757400, 4860801-4865800
Engine number: WM20-71818 to WM20-81817
Quantity: 10,000
Delivery (demanded): January 26, 1942
From this is it possible to calculate your WD number: 4865800 - (81817 -
81643) = 4865626 (assuming they were assigned in sequence, in the absence
of other information the best assumption we have)
WM20121941:
Contract number: C7218
WD serial number allocation: 5885918-5895917
Engine number: ?? *
Quantity: 10,000 (reduced to 5870)
Dates: August 10, 1944 - January 19, 1946
* Your number is probably in this range since a previous contract for 12,000
had a range of WM20-104818 to WM20-116817 (plus some small contracts for
another 17 bikes). Yours would then be bike #5107 in contract C7218, with WD
number 5891025 (same assumptions as above)
Cheers,
Piet Jan
-----Original Message-----
From: Dan Bever <danbever@juno.com>
To: mil-veh@skylee.com <mil-veh@skylee.com>
Date: Tuesday, May 25, 1999 07:05 CET
Subject: [MV] BSA M-20 vin # ID
>List,
>I have two BSA M-20 vehicle ID numbers that I wanted to see if someone
>might be able to identify the model years.
>1. WM2081643
>2. WM20121941
>Thanks in advance
>Dan Bever
>MVPA 18507
>
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