quote:Any other opinions on that gentlemen or more exactness on the date of production?
Yes. Danny, your 275534 obviously was made on May 28, 1940 (Tuesday), before the lunch break.
No, seriously:
quote

E/N National Proof Law of June 7, 1939) with an effective date of April 1, 1940
Nope. The effective date (date, when the law came into force) was January 15, 1940 (a Monday). I have a copy of the law – issued in the Official Reichs Gazette (Reichsgesetzblatt). The date January 15 as being the effective date is mentioned. Jim Cate and where told in 1998 by the manager of the Suhl proof house, that the change from Crown/N to Eagle/N markings was done in Suhl on January 16 – just because of the simple reason, that the tools were delivered on this date. Anyway: lets calculate with January 15, as the manager's story might be true – but maybe not.
Another important time frame: Feb/March 1940, when the change from "Modell 38" to "Modell H" was carried out. Fits quiet well with the double e/37 accepted H models.... So, taking the first eagle/N proofed Sauer # 269,1xx as being proofed on January 15 (or 16...), I guess, your 275534 was made somewhere between May and July, 1940.
But I am of course aware of the fact, that the April 01/January 15 discussion will never end...
Martin