I.A. & N.C. Keyless Half Hunting Case Karrusel Pocket Watch
Record status
Individual type · partial
Period
Circa 1900
This half hunting case keyless pocket watch is attributed to I.A. & N.C., London, circa 1900. Housed in an 18K gold case, the watch features a 52 1/2 minute Bonniksen karrusel regulator.
The movement, numbered 125322, is an 18’’’ frosted gilt three-quarter plate calibre with 17 jewels. It incorporates a going barrel, a lateral lever escapement, and a free-sprung cut bimetallic compensation balance equipped with gold screws. The balance assembly utilizes a blued steel Breguet balance spring with a terminal curve and a diamond endstone. This specific timepiece is documented as having achieved a Class A Kew Certificate with 82 marks.
The construction of the karrusel involves a revolving carriage containing the fourth wheel, designed to mitigate position errors during operation.
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
- Date
- Circa 1900
- Type
- Keyless pocket watch with karrusel
- Maker
- I.A. & N.C., London
- Case Number
- 5051
- Jewel Count
- 17
- Certification
- Kew Certificate, class A, 82 Marks
- Place recorded
- London
- Regulator Type
- Bonniksen 52 1/2 minute Karrusel
- Movement Number
- 125322
- Maker / attribution
- I.A. & N.C.
Design
- Case and Dial
- The timepiece is presented in a half hunting case crafted from 18K gold. This configuration allows for the viewing of the time through an aperture in the front cover, which features Roman numerals arranged in a ring. The design protects the dial while allowing for immediate reading of the hours and minutes. The auction description notes the case condition as 'Good' and the dial condition as 'Good'. The exterior of the hunting case displays indices, a standard arrangement for this watch configuration, which facilitates reading when the cover is closed.
- Visible features
- • Half hunting case with Roman numeral indices on the exterior cover. • Frosted gilt three-quarter plate movement finish. • Visible Bonniksen karrusel carriage containing the escapement. • Blued steel screws securing the movement plates.
- Movement and Karrusel
- The movement is an 18’’’ frosted gilt three-quarter plate calibre featuring 17 jewels and a going barrel. The technical heart of the watch is the Bonniksen 52 1/2 minute karrusel, a mechanism designed to reduce positional errors by rotating the escapement. Unlike a tourbillon, the karrusel has a slower rotational speed and includes the fourth wheel within the carriage. Precision timing is maintained by a lateral lever escapement and a free-sprung cut bimetallic compensation balance, which is fitted with gold screws. A blued steel Breguet balance spring with a terminal curve and a diamond endstone complete the regulation assembly.
- Certification and Condition
- The watch is distinguished by a Class A Kew Certificate with 82 marks, indicating that it underwent rigorous chronometric testing. The overall grading is reported as 'AA Very good' according to the auction house's internal system.
Identification
- Serial number
- 5051
- 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 auction house recommends an overhaul for the movement.
- Research required: Attribution to I.A. & N.C. based solely on the provided auction description.