A special vintage Blancpain Fifty Fathoms, Milspec AND Rotomatic Incabloc.
Most of the Fifty Fathoms Milspec are only Milspec, but there are some special ones, such as the Double Swiss, OR... The Rotomatic Incabloc.
Here are some photos I could take of one, belonging to a friend of mine.
An ultra rare version, as I could see only two in the real life, and a couple more on photos.
Yes, my friends, building a collection of vintage Fifty Fathoms is an impossible mission. You have to avoid the bad ones, and when you find a correct one, you just realize that there are several highly tempting versions.