Seiko Mono Pusher Chronograph Ref. 5717-8990
Record status
Individual type · partial
Period
1966
Maker / issuer
SeikoThis Seiko Mono Pusher Chronograph, identified by reference 5717-8990, dates to 1966. It was developed to commemorate and support the 1964 Summer Olympics held in Japan.
The timepiece features a mono-pusher mechanism that performs start, stop, and reset functions for the 60-second chronograph timer. Compared to the earlier 45899 model, this version includes a date wheel complication. It is equipped with a bi-directional stainless steel bezel containing original black enamel markings and is presented on its original stainless steel rolled-link bracelet. The dial is a sunburst silver finish with luminous markers and hands.
The caseback displays an Olympic torch insignia and is engraved with the model's reference and serial numbers.
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
- Mono-pusher chronograph wristwatch
- Place recorded
- Japan
- Production year
- 1966
- Caseback details
- Olympic torch insignia
- Maker / attribution
- Seiko
- Chronograph function
- 60-second timer
Design
- Design Context
- This chronograph was produced as part of a series intended to support the 1964 Summer Olympics in Japan. The project was developed alongside the Seiko World Time model to mark the Games of the XVIII Olympiad. The movement is identified as a 21-jewel calibre, featuring the Diashock system as indicated on the dial. The auction description reports that the watch is functioning and keeping time, though the history of previous servicing is not known.
- Visible features
- • Silver sunburst dial with applied markers • Single pusher located at the two o'clock position • Bi-directional bezel with black enamel numerals • Bracelet with a rolled-link construction
- Dial and Complications
- The watch features a sunburst silver-colored dial. The hours are indicated by applied markers with luminous material that exhibits a creamy green coloration. The hands are luminous, with the vendor reporting stable, partial loss of luminous material on the minute hand. A date wheel complication is positioned on the dial, a feature distinguishing this reference from the earlier 45899 model. The chronograph functions are operated via a single pusher, which manages the start, stop, and reset operations for the 60-second timer.
- Case and Bracelet Construction
- The timepiece is housed in a 38mm stainless steel case. The vendor suggests the case has not been polished and retains sloping beveled lugs with signs of use. A bi-directional stainless steel bezel is fitted to the case, featuring original black enamel-filled markings. The watch is worn on its original rolled-link Seiko bracelet. The caseback contains engravings of the model reference and individual serial numbers. An embossed Olympic torch insignia is present on the caseback, linked to the object's commemorative association with the 1964 Tokyo Olympic Games.
Identification
- Reference
- 5717-8990
- Serial number
- 640XXX
- 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: Unverified service history
- Research required: Unpolished condition of the case is a belief rather than a confirmed fact
- Research required: Exact level of lume loss in the minute hand is subjective