105.012-64

Speedmaster Moonwatch 105.012 — 105.012-64

Undated

Very rare; all dials carry T marks, close- or wide-spaced.

A 105.012-64 on a suede strap: asymmetric case with crown guards, black dial with Speedmaster Professional, baton hands, black dot-over-ninety tachymetre bezel. Lot gives movement 22'083'266, archive-dated May 1965. · Photo: Sotheby's · © Sotheby's, used with permission · Source: https://www.sothebys.com/en/buy/auction/2019/omega-speedmaster-to-the-moon-and-back/omega-speedmaster-ref-105-012-64-tritium-a

Identifying details

Baton hands
Straight white stick hour and minute hands, as on the Moonwatch.
Dot over ninety (DON)
Black “Base 500” tachymetre insert with the dot printed above the 90.

Variants of 105.012

Switch between variants of this reference. The current variant is highlighted.
Variant	Production
105.012-63	Undated
105.012-63 · 105.012, Automovil Club Peruano (ACP)	Undated
105.012-64Current	Undated
105.012-65	Undated

Case & movement

Reference: 105.012
Production: Undated
Movement serials: c. 20.53M–22.83M
Case material: Stainless steel
Case diameter: 42 mm
Crown: 7 mm
Movement: Manual winding
Caliber: Omega 321

Dial, bezel & hands

Movement

Omega 321

Hand-wound column-wheel chronograph of Lemania origin (Lemania 27 CHRO C12 / 2310 family), used by Omega from 1946 to 1968 and in every Speedmaster up to the 145.012. Early examples have a symmetrical clutch bridge; later ones an asymmetrical bridge.

Manual winding · Introduced 1946 · 18,000 vph · 17 jewels · Ø 27 mm