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Some specifications for this reference are on file; the record is incomplete.

Omega · Speedmaster

Speedmaster Professional Moonwatch

Ref. CK2915 — “Broad Arrow

discontinuedFirst SpeedmasterPartially documentedLast reviewed Not yet reviewed

Overview

Nickname
Broad Arrow
Production
1957–1959
Era
First Speedmaster
Status
discontinued

Case

Case diameter
39mm
Case material
Stainless steel
Bezel
Tachymeter
Bezel material
Steel (later aluminium)
Crystal
Acrylic (Hesalite)
Caseback type
Screw-down solid
Water resistance
60m

Dial & Hands

Dial
Black
Hands
Broad arrow
Lume
Radium then tritium
Lume type
Radium

Movement

Movement
Manual chronograph
Caliber
321
Manufacturer
Omega (Lemania base)
Winding
manual
Frequency
18,000 vph
Complications
Chronograph, tachymeter
Functions
Chronograph, tachymeter