Wow that case is pretty rare!
I don't know I'd have this one taken apart and verified by Jim Lager before I'd put a cent down on it, it has to be verified, while the chrome ones could so easily be of one of those Midland-Canada MP fakes that were made in the 1980's and then passed around the Leica community, the number #241 just seems to be a number I remember seeing before?
These cameras are while not easy to fake, have been faked, due to a bunch of non-stamped original MP tops and Leicavit M bottoms falling into the hands of a very suspicious greedy ex-Leica repairman........etc. etc.
Tom
P.S. If it's a real one, it should bring close to $90,000 to $100,000 easy.