Gruen Precision Wristwatch, Caliber N510SS
Record status
Individual type · partial
Period
1960s
This is a vintage Gruen Precision manual-wind wristwatch reported by the seller to date from the 1960s. The piece features a gold-tone base metal bezel with a stainless steel back, measuring 33.2 mm in diameter.
Its silver sunburst dial is fitted with applied gold-tone Arabic numerals at 12 and 6, baton hour markers, luminous dots, and luminous hands. The source reports that the watch is powered by a 17-jewel Swiss Gruen caliber N510SS manual movement operating at 18,000 beats per hour with a sweep second hand.
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
- Manual-wind wristwatch
- Origin
- Swiss made
- Frequency
- 18,000 beats per hour (2.5 Hz)
- Case Diameter
- 33.2 mm
- Place recorded
- Switzerland
- Movement Caliber
- N510SS
- Maker / attribution
- Gruen Watch Co.
- Case Back Reference Marking
- 510 RSS
Design
- Visible features
- • Gold-tone round case with prominent lugs and a fluted crown at 3 o'clock. • Silvered dial signed 'GRUEN PRECISION' below 12 and 'WATERPROOF' above 6. • Applied gold-tone Arabic numerals at 12 and 6 alongside baton hour markers. • Gold-tone luminous hour and minute hands with a sweep second hand. • Mounted on a dark brown textured leather strap.
- Dial and Visual Presentation
- The watch features a silver sunburst dial configured with applied gold-tone Arabic numerals at the 12 and 6 positions alongside baton indexes. Luminous dots accompany the hour markers, paired with matching gold-tone luminous hour and minute hands and a central sweep second hand. Visual markings reported on the dial include the Gruen name, 'Precision', 'Waterproof', and 'Swiss'. The watch is fitted with an aftermarket two-piece brown leather strap with a gold-tone buckle.
- Case Construction and Dimensions
- The round case measures 33.2 mm in diameter (35 mm including the crown), with a lug-to-lug distance of 41.8 mm and a thickness of 9.2 mm. Lug width is listed as 17.7 mm, tapering to a 16.5 mm band width. The listing notes a base metal bezel paired with a stainless steel back. Reported case-back markings include 'Gruen Precision Waterproof Shock Resistant Anti-Magnetic Base Metal Bezel Stainless Steel Back Stainless Steel Back Gruen Watch Co. 510 RSS'.
- Movement Specifications and Cataloguing Constraints
- The internal movement is not visible in the provided primary photograph; its details rely entirely on the seller's transcription. The movement is reported as an unadjusted Swiss-made Gruen manual-wind caliber N510SS with 17 jewels, operating at a frequency of 18,000 beats per hour (2.5 Hz) with a stated 42-hour power reserve. The seller dates the piece to the 1960s, though no serial number or factory ledger documentation is provided in the source to verify this date. Additionally, historical dial designations such as 'Waterproof' reflect original period trade labeling and are not verifiable indicators of modern water resistance.
Identification
- Reference
- 510 RSS
- 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: The internal movement and case back markings are not directly visible in the primary photograph.
- Research required: Historical waterproof markings should not be relied upon for current water exposure.