Bulova  Dual Crown
Super-Compressor

Case Diameter: 42mm
Case Height: 13mm
Case length: 52 mm
Lug Width: 22 mm
Crowns: 6mm, non-screw down
Crystal: 38.5 mm, acrylic
Movement: Bulova cal. 11AFAC, 17j
automatic, 18,000 bph, 40 hr power
reserve
Case material: Stainless steel
Bezel: Internal bi-directional
Water resistance: 200 meters
Vintage: 1961 (date code M1)

Other Super-Compressor watches:

Droz Super-Compressor

Fortis Super-Compressor  

Hamilton Super-Compressor