Nearly 3 years ago I bought this BSA, or what was left of it. It was located near the Tsjech border and turned out to be a former Dutch army KM21 which was most likely captured and used by the German army.
It had an industrial made steel plate on the magneto platform so that a Bosch Magdyno could be fitted and the battery carrier was changed to accept a Bosch battery. The left-front side of the tank was badly dented and the front-frame tube was bend so it probably had an accident which would explain the lack of forks and wheels. I decided to bring it back to Dutch army specification with the green colour and Lucas equipment but sometimes tempted to paint it grey and fit Bosch again....
I didn't go for the factory fresh look and decided to use no filler so the marks from the past can be seen. The original engine and early gearbox is still on the bench but ready for installation. There are a few rare parts still missing and need some markings on the tank but it can now be ridden and yet waiting for the license.
It was a great time restoring it and have found lots of help from forummembers by supplying information and parts. All those wonderful wartime pictures has been a great reference and all the generously given technical support on this forum is really amazing and surely has increased the level of this restoration.
So thank you all and keep going on !! [ 
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Michiel / Netherlands
What are these little things Henk...? Can't see with my untrained eyes 
email (option): viaconsu [at] planet'dot'nl
Don't know much of BSA.... but this one looks almost as good as a 16H!
Bloody great job!
email (option): ferrarakias@hotmail.com
Nice looking bike, I like the used look....
Thanks for your kind words!!
The small side stand was taken off and sold separately just before I bought the bike. So I looked for years and emptied many boxes on those nice British jumbles and just a few months back I bought a box of rusty parts from a small jumble here in Holland, only because it was cheap. When I emptied it at home I just couldn't believe my eyes! lucky me. And when fitted I found out that this tiny stand is more than a gimmick because the bike stands very firm on it and it is very handy.
The 2 pieces of metal welded on both side of the carrier could be a German modification to fit their pannierbags. And the original engine, which is not fitted yet, has some interesting modifications. (I have posted them before):
A steel inspection hole cover and a oilpump cover machined from solid :
and the magdyno spacer for fitting a Bosch unit with the 4 halfrounds to fit nicely on the BSA crankcase :
These modifications are looking industrial made so they must have captured a fairly large amount of these (nearly new then) KM21's in may 1940 to make it worthwhile and had a few other ideas on the design..... 
If anyone have seen similar parts on an engine please let know.
Regards, Michiel
email (option): m.wijbenga@hotmail.com
Hi Peter, It is a Dutch written brass plate with some technical details and the frame and enginenumbers and it also states that the owners is DvD, which could stand for: Departement van Defensie. But not really sure if that is correct.
So I assume it was fitted at the factory or in the Netherlands when the bike arrived in 1939.
Fortunatly the numbers on the brassplate still matches the frame and enginenumber
Regards, Michiel