Hi All,
Its an intressing post to read, but I have two things that I think are an mis interpretaion of the facts (at least thats my personal interpretation):
First off all the COS of an Mk II is 1650. Just like thier Britishcounterparts.
Second, the s/n range for the Mk1a scope started below the #300. I Own an Mk 1a with the serial number 264-C. The scope body hasn't been scrubed or renumberd.
So I agree that REL was an interresting company with lots of un explained "habits".