Reference: CK 2914 - ST 135.004
International collection: 1957 - 1963
Movement: Manual winding (mechanical)
Caliber number: 284/85/86
Movement of cal. 284 (created in 1955) or cal. 285 (created in 1958), or cal. 286 (created in 1961), central sweep-second hand, 17 jewels.
Case: Stainless steel
Case back: Screw-in
Dial: Specially thick matt black dial (1 mm vs. 0,4 mm for a standard dial) with luminous hour markers and radium luminous hands of “Broad arrow ”, “Dauphine ” or “Stick ” type.
Crystal: Hesalite
Bracelet: Stainless steel ref. 7077 or 7912. (I have since acquired a 7912 bracelet)
Water resistance: 60 meters

More product information

Specially designed for scientists, technicians, electricians, etc. working within close distance of powerful electric currents).
Case : round (38 mm diameter), "Naiad" crown, screw-in case back with "O'ring" gasket, with SS bracelet of ref. 7077 or 7912.
For leather straps of 19 mm lug-size
International Collection : 1957 - 1963 approx.
Swiss retail price (1960) : CHF 285.- (on bracelet ) or 245.- (on leather).

(Information courtesy of Omega Vintage Information @ www.omegawatches.com)