Looking at these machines, which I guess are early(ish) war judging from the valanced mudguards, oil presuure release valv etc. What are the circular objects in the vicinity of the gear change lever - not all quite in the same place? Can't think I've seen these before, or did I miss the discussion? Dunc.
Here is a similar front number plate marking, there could be a small gap between the "DR" and the "A" and in this case the "8" looks like its been chalked on?
Duh!! Why didn't I spot that? Regarding the front number plates, is it possible these are civvy plates and are impressed bikes? The sign written bit on the rear mudguard being the batch's original supplying dealer? The 'RB' would be Nottingham, anyone know the name of any of the local dealers along the lines of 'B**lys', the only thing I would be confident with is the last scroll letter 's'. The same lettering can be seen on the second machine.
Probably not a civilian registration but a section and individual machine identifier. If it was a local authority registration, it would be Derbyshire rather than Middlesex.
Here is a DRA :-
I suspect DR - A Section or DR - B Section plus machine ID.
Rob, I think only R.Sigs would have had a DR section - RASC used the machines mainly for other functions and background colour appears to be standard HQ black, as used by R.Sigs until the blue / white came along.
I couldn't find a corps '31' in my scans of the Movement Control Home Forces document of June 1941 but it does appear as Corps Signals in the BEF 1 Corps booklet.
It seemed reasonable to me therefore to conclude that the '31' was in use prior to the post-Dunkirk security revision of AoS serials - Jerry had all the identification information on those. Did they then re-introduce some serials prior to 1944 ?
I notice in these pictures that the C numbers seem to be missing from the right hand side of the tanks. Was it normal practice to have the number just on one side when the division marking was in place?
It was normal practice on all the pre-war bikes to only have the census number on the nearside (pavement side) but it took me about ten years to realise the fact. It isn't documented anywhere but examination of preserved early-war fuel tanks has shown that this was indeed normal.
Here a few forum photo that shows that just one side had a tank C number while on the other side of the BSA there is a C number on the font number plate.
You might have to refresh the page to see the new photo.