i`ve put off asking for too long,would anyone have any information on frame number wd m20 59332, any info would be gratefully accepted,cheers dave

Hi Dave, just for clarity, can you give the number exactly as its stamped.

well this is embarrassing,off the frame as stamped
WM20.59332 DAVE

No intention to embarrass, its just a common mistake to verbally ad the "D" but its better to start out spot on. Looks a 42 maybe 41 but the guys will know more accurately than me.

Here a part of the page taken from the BSA factory ledgers with your bike in it.

Your bike is born 30-04-1942 and it had, like all bikes from that period, matching engine and frame numbers.

Your BSA is not in the post-war military key cards.

Henk

email (option): ahum@quicknet.nl

Hi Henk,do you have anything on bike engine/frame number,WM20 68004,thank`s jeff

email (option): fisherman322@yahoo.com

email (option): welbike@welbike.net

Hi Jeff,

We have the ledger information about WM20's up to WM20 69699 and yes yours is still in it.

Here the page with your bike in it, pretty cool isn't it?

Henk

email (option): ahum@quicknet.nl

Any info on my bike, WM20 39243. THanks in advance
Marcus

Thank`s Henk for the ledger info and Lex for your time,jeff

email (option): fisherman322@yahoo.com

thanks henk for taking the time to find my frame number in the factory ledgers, with my frame number being wm20 59332 i`ve calculated the c number to be c4663040 could someone please double check it for me please as i`d hate to find that number in a photo and then discover i was wrong.has anyone found their bike in a wartime photo,like the story on the key cards would henk be able to tell us how he came by the factory ledgers, cheers dave

email (option): wandins@bigpond.net.au

Hi Dave

I calculate WM20 59332 to be C4663075

Rob

email (option): robmiller11@yahoo.co.uk

I also end up with C4663040.

Henk

email (option): ahum@quicknet.nl

Right I will try to explain my answer.

Contract C11101 has 2 blocks of serials and 2 blocks of frame number, and the gaps are in different places, so in order to make a calculation you need to break the contract into 3 parts.

part 1, 5,000 machines
c4635001 = wm20 53413
c4640000 = wm20 58412

part 2, 3,000 machines
c4662156 = wm20 58413
c4665155 = wm20 61412

part 3, 2,000 machines
c4665156 = wm20 61448
c4667155 = wm20 63447

This is the point that the keycards show there true value because without them this would all be guesswork.

The keycards show the following machines to still be in service with matching frame numbers and serials corresponding to the above table in the late 1940s

part 1 140 machines
part 2 47 machines
part 3 37 machines

So thats why I'm pretty sure wm20 59332 = C4663075

Rob

email (option): robmiller11@yahoo.co.uk

Hi Rob,

Yes you are right, I have simplified these contracts in the list I have in a way that mistakes sneak in. I made that list years ago and I shouldn't use that list anymore.

Henk

email (option): ahum@quicknet.nl