166.077, Prototype

Seamaster PloProf 166.077 — 166.077, Prototype

1968–c. 1970

Pre-series watches: the first prototype dates from 1968 and used the caliber 1000. Some were tested by COMEX divers off Ajaccio (Operation Janus, 253 m) or by Ocean Systems Inc. in the USA; these fetch by far the highest auction prices.

HODINKEE notes that over 60% of PloProfs serviced at Omega in Bienne had swapped movements, and that service dials, hands and bezels are common.

Pre-series PloProf shown with its box, Isofrane-type strap and two bracelets: asymmetric monobloc case with the crown and locking nut on the left and the red bezel-release button, blue dial with orange minute hand and date at three. Antiquorum catalogues it as a prototype. · Photo: Antiquorum · © Antiquorum, used with permission · Source: https://catalog.antiquorum.swiss/en/lots/omega-ref-166-077-seamaster-600-ploprof-prototype-lot-324-514

Identifying details

COMEX issue
Issued to the French diving company COMEX.
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, PrototypeCurrent	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 Prototype	Undated

Case & movement

Reference: 166.077
Production: 1968–c. 1970
Case material: Stainless steel
Case size: 45 × 54 mm
Water resistance: 600 m
Crystal: Chemically hardened mineral glass
Movement: Automatic
Date: Yes

Dial, bezel & hands

Unknown attributes are left out rather than guessed.

Identifying details

COMEX issue

Issued to the French diving company COMEX.

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.

Variant

Production

166.077, PrototypeCurrent

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 Prototype

Undated

Seamaster PloProf 166.077 — 166.077, Prototype

Identifying details

Variants of 166.077

Case & movement

Dial, bezel & hands

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Suggest a correction

Suggest a correction

Seamaster PloProf 166.077 — 166.077, Prototype

Identifying details

Variants of 166.077

Case & movement

Dial, bezel & hands

Read more