Ball DM2236A-SCJ-BK Engineer Hydrocarbon Submarine Warfare Ceramic // Pre-Owned Astron Scratch-resistant convex sapphire crystal

Scratch-resistant convex sapphire crystal

HAND-POLISHED SILVERED COLOR WITH WHITE LUMINOUS TREATMENT HOUR AND MINUTE HANDS

This allows the watch to withstand extreme changes in air pressure - necessary for the watch's use by military pilots at altitudes of over 35

and an anti-reflective sapphire crystal

Ball DM2236A-SCJ-BK Engineer Hydrocarbon Submarine Warfare Ceramic // Pre-Owned Astron Scratch-resistant convex sapphire crystalBox Papers: Yes Condition: Excellent Movement Automatic caliber BALL RR1102 C Chronometer certified COSC Functions 15 micro gas tubes on hour, minute and second hands and dial for night reading capability Hours, minutes, sweep seconds, day and date Shock resistance 7,500Gs Water resistance 300m 1000ft Antimagnetic 80,000A m Case Stainless steel 42mm, height 16. 5mm Mu metal shield Luminous ceramic unidirectional rotating bezel Amortiser patented anti