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3590.50 vs CK2915

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Specification

Omega

3590.50

Speedmaster Professional Moonwatch

Omega

CK2915

Speedmaster Professional Moonwatch

Broad Arrow

NicknameBroad Arrow
Production1988–19961957–1959
EraCaliber 861First Speedmaster
Statusdiscontinueddiscontinued
Case diameter42mm39mm
Case materialStainless steelStainless steel
BezelTachymeterTachymeter
Bezel materialBlack aluminiumSteel (later aluminium)
CrystalAcrylic (Hesalite)Acrylic (Hesalite)
Caseback typeScrew-down solid
Water resistance50m60m
DialBlackBlack
HandsStraight (baton)Broad arrow
LumeTritium then Super-LumiNovaRadium then tritium
Lume typeRadium
MovementManual chronographManual chronograph
Caliber861321
ManufacturerOmega (Lemania base)Omega (Lemania base)
Windingmanualmanual
Frequency18,000 vph
ComplicationsChronograph, tachymeterChronograph, tachymeter
FunctionsChronograph, tachymeter