Most recent GMT that I've owned. Mk 1 from 1967 with chronometer papers from the son of the original owner, who wore it during his tenure as an USAF pilot.
I'll also make a shameless plug for my 1675 reference website, GMTMaster1675.com. Made with the help of many other fine collectors, who have my thanks.
Figured I should post these here as a point of reference.
It鈥檚 a 19701675mk2. When I got it, its only obvious flaw was a later blue bezel with narrow font. I got a proper red back, FF bezel from @ATWG馃憤 and behold the difference!
Before
After
I鈥檓 really surprised how big a difference it makes. At least, to me.