Menu

166.077, Prototype · 166.077, Titanium Prototype

Seamaster PloProf 166.077 — 166.077, Prototype · 166.077, Titanium Prototype

Undated

Fewer than a dozen titanium cases were ordered from Schmitz Frères in the early 1970s to test a lighter case (49.5 g against 82.5 g); cost stopped production. Antiquorum's “T 2” example has an early dial signed only “Seamaster”.

Titanium-cased PloProf test piece on a mesh bracelet, its matte grey case visibly darker than steel. Early dial signed only “Seamaster”, without “600” or “Professional”, blue-grey with orange arrow minute hand, red bezel-lock button and left-side crown nut. · Photo: Antiquorum · © Antiquorum, used with permission · Source: https://catalog.antiquorum.swiss/en/lots/omega-ref-166-0077-prototype-t-2-seamaster-ploprof-lot-344-31

Identifying details

Monobloc case
One-piece case without a removable caseback; the movement loads from the front.
Bezel lock
Rotating bezel that only turns while a lock button is pressed.

Variants of 166.077

Reference overview →

Switch between variants of this reference. The current variant is highlighted.
Variant	Production
166.077, Prototype	1968–c. 1970
166.077, Prototype · 166.077, COMEX Janus Prototype (Blue Dial, Red Locking Nut)	1968
166.077, Prototype · 166.077, R&D Prototype with Caliber 1001	1970
166.077, Prototype · 166.077, Titanium PrototypeCurrent	Undated

Case & movement

Reference: 166.077
Production: Undated
Case serials
Case material: Titanium
Case size: 45 × 54 mm
Water resistance: 600 m
Crystal: Chemically hardened mineral glass
Movement: Automatic

More specifications (1)

Date

Read more

In-Depth: Getting To The Bottom Of The Omega PloprofRead more at HODINKEE (opens in a new tab)

Omega Seamaster PloProf 166.077 166.077, Prototype 166.077, Titanium Prototype · The Index