Rotary Aquaplunge
Scuba Chrono

Case Diameter: 37.5 mm
Case Height: 14.5 mm
Case length: 47 mm
Lug Width: 19.5 mm
Movement: Landeron cal.
154 chronograph. Manual
wind, 17j, 18,000 bph, 42 hr
power reserve.
Case material: Stainless
steel
Crown: Non-screw down
Bezel: Bi-directional, no click
Water resistance: 150m
Vintage: early '60s

Similar to the Aquastar
Deepstar of the same era, it
shares the same case.