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The Encyclopedia of Horology

Wristwatch · Diving watch

Omega Seamaster 'Big Crown' Automatic Steel Diving Watch, Ref. 166.062

Partially verified

This 1970s Omega Seamaster diver's wristwatch, reference 166.062, is known as the 'Big Crown' version for its oversized screw-down winding crown. It features a stainless steel case measuring 37.2 mm in diameter, paired with a graduated black rotating bezel and a Plexiglas crystal equipped with an internal date magnifier. The midnight-blue dial displays applied hour markers, a peripheral minute track, and a date window at the 3 o'clock position. Powered by an automatic movement signed Omega, the watch is fitted with a black perforated Tropic-type rubber strap and accompanied by an Omega presentation box.

Front three-quarter view of the Omega Seamaster Big Crown ref. 166.062 resting in a red presentation box
Front three-quarter view of the Omega Seamaster Big Crown ref. 166.062 resting in a red presentation box — Joaillerie Landauer. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.proantic.com
Category
Wristwatch · Diving watch
Maker / attribution
Omega
Reference
166.062
Catalogue / lot identifier
1767547
Source-reported date
1970s
Country
Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and External Features

This Omega Seamaster reference 166.062 is a stainless steel watch from the 1970s. The case measures 37.2 mm in diameter excluding the crown. It features a prominent, large screw-down crown referred to in the source as the 'Big Crown'.

The case back is a screw-down design featuring the Seamaster seahorse emblem. The watch is fitted with a graduated black rotating bezel.

Evidence for this section
  • “Reference: 166.062”
  • “diameter of 37.2 mm excluding the crown”
  • “large screwed crown known as "Big Crown"”
  • “Bottom: screwed, Seamaster seahorse decoration”
  • “Lens: graduated black rotating, particularly smooth operation”

Dial and Crystal

The watch features a midnight-blue dial with metallic applied hour markers and a peripheral minute track. A date window with a cyclops magnifier is located at the 3 o'clock position.

The watch utilizes a Plexiglas crystal, which is described as original and repolished.

Evidence for this section
  • “Dial: original midnight blue, metallic applied hour markers, peripheral minute track, date window with cyclops magnifier”
  • “Glass: Plexiglas (original, repolished)”

Movement and Strap

The timepiece is powered by an automatic movement signed by Omega. Specifics regarding the movement caliber are not provided in the source.

The watch is mounted on a black rubber Tropic-type strap. The source notes that while the watch retains its original robustness, water-resistance cannot be guaranteed for modern use without professional inspection.

Evidence for this section
  • “Movement: automatic”
  • “Strap: black rubber Tropic type”
  • “water-resistance cannot be absolutely guaranteed in modern aquatic use without prior inspection by a specialist watchmaker.”

Open research questions

  • What is the specific movement caliber number for reference 166.062?
  • Can internal case back markings verify the production date of the case?
  • What is the full serial number of this specific unit?

Source evidence

Recorded claims and source quotations for Omega Seamaster 'Big Crown' Automatic Steel Diving Watch, Ref. 166.062
FieldSource-reported valueSource quotation
Reference166.062“Reference: 166.062”
Case diameter37.2 mm excluding the crown“with a diameter of 37.2 mm excluding the crown”
DialMidnight blue with applied hour markers and date aperture“Dial: original midnight blue, metallic applied hour markers, peripheral minute track, date window with cyclops magnifier”
StrapBlack rubber Tropic-type“Strap: black rubber Tropic type”
CrystalPlexiglas (original, repolished)“Glass: Plexiglas (original, repolished)”
Case depth1.18 cm“épaisseur de la boîte: 1,18 cm”
Length with lugs4.14 cm“4,14 cm avec les cornes”

Visible details

  • Midnight blue dial inscribed 'OMEGA AUTOMATIC' below 12 and 'Seamaster' above 6.
  • Prominent oversized fluted screw-down crown at 3 o'clock.
  • Black textured Tropic-style rubber strap with perforations and crosshatch pattern.

Research qualifications

  • Movement caliber number and movement photograph are not provided in the listing.
  • Case back is not visible in the provided image.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Proantic: Omega Seamaster Big Crown Automatic Steel Diving Watch On Tr

Reviewed 2026-10-22 · Record ef09ebd63e

Terms in this record

Glossary explanations for terms named in this object’s record.