You're right about that of course DRP, there was a bunch of WW Mk1telescopes dated 1944. But to be honest, I don't think it mattered too much to the sniper whether he got a Mk1 or 2 telescope although the instructors were definately aware that the '...newer, more easily adjustable Mk2 telescope...' was coming on stream. FINER adjustmnent perhaps, but certainly not easier adjustment I'd suggest, but there you go!
I look at it as a newer pattern Bedford or Land Rover. Something that is coming on stream but you'll still have the old ones until..... And they weren't going to stop Mk1 production and waste all the parts. Canadahad the obvious solution in using the prepared/in-hand Mk1 tubes and fitted Mk2 clicker plates, making them effectively Mk2's....... but calling them Mk1A's
The short answer is that I don't think that they'd be allowed to waste the parts that were in hand but WW seem to be the last of the Mk1's don't they