Hi

I have recently acquired this Speedmaster Mark IV with a case where the entire movement/glass is removable... I showed it to my watchmaker and he told me it was a special case that existed and that there is of course of joint that comes to hold everything together. I was wondering if you ever saw such a thing ? As usual pictures are always better than words...

 

What the Fakk??? .................................. Calling Speedmaster experts!

 

http://chronomaddox.com/omega/articles/mark_series/MarkSeries.html

 

I don't know anything about it but it's a very handsome looking watch/lume and is that the original strap?

 

Looks like a mkIV automatic produced from 73 .Where did you from as it looks amazing .

 

Par toutatis ! Spot on ! Thanks a lot Vercingetorix

 

Original Strap indeed sir

You are right, 73 or 74... the guarantee paper says it has been bought on the 25th of September 1974

I found this one in France and indeed the patina is gorgeous !

 

The removable central case is a standard feature of all MkIVs.

 

Quite a common case design for Lemania 1341 movement watches and Speedmaster 1040/1045 There should be a seal/gasket that makes it near impossible to push out.

 

The Swiss patent is stamped on these casebacks, "BREVET 508925", you can see the application here:
https://worldwide.espacenet.com/pub...&DB=&locale=en_EP&CC=GB&NR=1286120A&KC=A&ND=1

Per Omega's Speedmaster 60th Anniversary online presentation "The double-case design was created for added protection and easier servicing". https://www.omegawatches.com/planet-omega/60th-anniversary-speedmaster/speedmaster-125-1973

 

That is very cool. Nice pick-up!

 

A nice "containercase" watch,gratulation