Omega Speedmaster Mark IV, Ref. ST 176.009
Record status
Individual type · partial
Period
late 1970s
Maker / issuer
OmegaThis Omega Speedmaster Mark IV, identified by reference ST 176.009 and movement number 34684219, is a self-winding stainless steel chronograph wristwatch produced during the late 1970s.
The watch features a two-body, tonneau-shaped brushed steel case measuring 42 by 45 mm, with a thickness of 15.5 mm. It is equipped with hooded lugs and a screw-down case back embossed with the Seamaster logo. The watch is powered by the copper-colored Caliber 1045, which incorporates 17 jewels, a straight-line lever escapement, and a shock absorber. The dial is black with luminous baton indexes, displaying day and date apertures, subsidiary dials for seconds and a 12-hour register, and a 24-hour indicator.
A central white hand acts as a 60-minute register. The tachometer scale is reverse-painted on the sapphire crystal, and the watch is completed with a stainless steel Omega bracelet featuring a deployant clasp.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Chronograph wristwatch
- Maker
- Omega
- Case Back
- Screw-down with embossed Seamaster logo
- Reference
- ST 176.009
- Tachometer
- Scale to 500UPH on crystal
- Jewel Count
- 17
- Case Dimensions
- 42 mm x 45 mm
- Movement Number
- 34684219
- Movement Caliber
- Cal. 1045
- Maker / attribution
- Omega
Design
- Case and Crystal
- The watch is housed in a two-body, brushed stainless steel case characterized by a distinct tonneau shape and hooded lugs. It measures 42 mm by 45 mm with a depth of 15.5 mm. The crystal construction is integral to the dial presentation, featuring a tachometer scale graduated to 500UPH that is reverse-painted directly onto the sapphire. This configuration creates a deep appearance for the scale, protecting the markings from exterior abrasion while maintaining the clean lines of the bezel.
- Visible features
- • Tachometer scale reverse-painted on the sapphire crystal • Hooded lug design • 24-hour day/night revolving disc indicator • Black dial with luminous baton indexes
- Dial and Functions
- The black dial is set with luminous baton indexes and white baton hands. It provides significant information through its multi-register layout, including subsidiary dials for seconds and a 12-hour register. The day and date are shown through apertures located on the right side of the dial. Additional functional displays include a 24-hour indicator facilitated by an arrow on a revolving disc, allowing for night and day identification. The 60-minute chronograph register is integrated into the central dial by means of a distinctive white jet hand, separate from the primary time-telling functions.
- Movement and Condition
- The timepiece is powered by the Omega Caliber 1045 movement, a copper-colored caliber featuring 17 jewels. It utilizes a straight-line lever escapement, a monometallic balance, and a self-compensating flat balance spring, designed to provide consistent self-winding performance. Regarding the condition of the watch, the auction house grades the dial as 'As new' and the case as 'Very good'.
Identification
- Reference
- ST 176.009
- Serial number
- 34684219
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: Auction description advises that an overhaul is recommended
- Research required: Movement condition graded as 2*