Fortis Marinemaster Dual
CrownSuper-Compressor

Case Diameter:  42 mm
Case Height:  12.5 mm
Case length:  49.5 mm
Lug Width:  22 mm
Movement: ETA 2472 automatic, 21j ,
18,000 bph, 42 hr power reserve, date
change 12-8-12
Case material: Stainless steel
Crowns: Non-screw down w/ double
o-rings
Bezel: Internal bi-directional
Water resistance: 200 meters
Vintage: 1968 (case is dated 4-68)

Other Super-Compressor watches:

Bulova Super-Compressor

Droz Super-Compressor

Hamilton Super-Compressor