Croton Nivada Grenchen Aquamatic Caliber ETA 1256 Wristwatch
Record status
Individual type · partial
Period
1950s
This vintage Croton Nivada Grenchen Aquamatic wristwatch is dated by the seller to the 1950s. The source reports that it is powered by a 17-jewel Swiss automatic movement, caliber ETA 1256.
The round case measures 31 mm in diameter (34.8 mm with crown) and is constructed of base metal and stainless steel with faceted angular lugs. Its light-colored dial exhibits extensive mottled age patina, luminous Arabic numerals at the three-hour positions, dart hour markers, and matching hands. The dial is signed 'CROTON NIVADA GRENCHEN' and 'AQUAMATIC'.
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
- Self-winding wristwatch
- Caliber
- ETA 1256
- Lug Width
- 16 mm
- Case Diameter
- 31 mm
- Place recorded
- Switzerland
- Case Back Reference
- 61S6935
- Maker / attribution
- Croton Nivada Grenchen
Design
- Dial and Hands
- The dial displays a light champagne tone showing mottled age and surface wear across its center. It is configured with luminous Arabic numerals at the cardinal positions 12, 3, 6, and 9, interspersed with luminous dots and silver triangular dart hour markers, enclosed by an outer minute track. Branding is printed directly on the dial surface, signed 'CROTON NIVADA GRENCHEN' below the 12 o'clock position and 'AQUAMATIC' above 6 o'clock. The time is indicated by luminous matching hands paired with a center sweep second hand.
- Visible features
- • Patinated light-toned dial showing mottling and surface wear across the center. • Geometric stylized lugs extending from the polished round case. • Arabic numerals at 12, 3, 6, and 9 paired with triangular dart markers. • Signed 'CROTON NIVADA GRENCHEN' below 12 and 'AQUAMATIC' above 6.
- Case and Exterior Construction
- The watch features a round case constructed from base metal and stainless steel, distinguished by angular, stylized lugs extending from the polished body. Dimensions provided by the seller include a 31 mm diameter (34.8 mm including the crown), a lug-to-lug span of 37.4 mm, a thickness of 10.6 mm, and a 16 mm lug spacing. The case back markings, as reported by the vendor, transcribe Swiss patent references and specifications stating: 'Nivada S.A. Grenchen CROTON Base Metal Swiss Brev. N 189190 1878014 Stainless Steel Selfwinding Waterproof Incabloc 61S6935'.
- Reported Movement and Technical Data
- According to the seller's cataloging, the watch is powered by an automatic self-winding movement identified as an ETA caliber 1256 operating at 18,000 A/h with 17 jewels and a 42-hour power reserve. The listing notes the ETA 1256 (Etarotor) as the first automatic movement from ETA. The internal mechanism markings are reported by the vendor as 'Croton Nivada SA. Grenchen Seventeen 17 Jewels Unadjusted Swiss Cal. ETA 1256 E3SE C2306'. However, because movement photographs are omitted from the source record, these mechanical specifics remain seller-reported rather than independently confirmed.
Identification
- SKU
- WA-3610
- Reference
- 61S6935
- 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: Movement caliber ETA 1256 and internal case markings rely on seller description as movement photography is not shown.
- Research required: Fitted with an aftermarket replacement leather strap.