@Rob: I see you did a deep dive in to the BSA factory ledgers. I did the same last year, just to find out how many BSA's were actually delivered to the Dutch Army. I fully agree with your experiences, the ledgers are a bit chaotic from Jan 1940. I could not exactly determine how many BSA M21's were delivered to the Dutch Army, unfortunately. But just a tip: compare the factory ledgers from the 'engine' books with the 'frame' books. For example: the range of number with frame WM20 2966 in the frame book is a bit confusing, with many double entries. In the engine book it is very clear but with a lot double entries missing. I have the advantage that I have a lot of files from the 'Staatsbedrijf Artillerie Inrichtingen' from the Dutch National Archive. In these files it is stated for about 80% of the M21's, how many were ordered and when they were delivered (and in most cases to which Dutch Army units they were dispatched).
@Rob: very helpfull those photo's for the fitment of the internal twistgrip! I have a question about that. I see you are fitting the rubber directly on the metal tube, but according to the partslist a 'throttle twist grip patch, partnumber 27-9453' should also be fitted. Did you use that 1 as well or not? I would like to know, as I still have to fit mine on my WM21. See below for the part in the 1939 partslist.
@Rick: You are right , there are a lot of differences between the Dutch Army WM21's and British WD machines. I have found a very nice, badly worn example in(not fully original anymore) Czech Republic last year. I have imported it to the Netherlands,. It is a matching frame/engine KM21 from the first contract which went to the Dutch Army.
email (option): wdmotorcycles@gmail.com
Hi Bastiaan. I only put four of my series of six pictures in my last post. Indeed there is a brass cover (shim stock), before the rubber. On this one I held it together with insulating tape as I found previous grips tended to slip. Ron
email (option): ronpier@talk21.com