Antiquorum Auctioneers since 1974

Geneva, May 10, 2026

LOT 380

EVAN ROBERTS, ENGLAND, 34 MINUTES KARRUSEL, MAKERS TO THE ADMIRALTY, CENTER SECOND POCKET CHRONOMETER, SILVER

CHF 3,000 - 6,000

HKD 29,800 - 60,000 / USD 3,800 - 7,600 / EUR 3,300 - 6,500 / JPY 610,000 - 1,210,000

Sold: CHF 27,500

A fine and rare, silver, manual wind open-face, keyless pocket chronometer with central seconds, featuring a 34-minute Karrusel (carrousel) regulator. With hallmark of British Patent No. 21421 by Bahne Bonniksen for his Karrusel clock mechanism, filed in England circa 1892.


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Grading System
Grade: AAA

Excellent
Case: 3-8

Good

Slightly scratched
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3-01

Good

HANDS Original

Brand Evan Roberts, England

Model 34 MINUTES KARRUSEL

Year English hallmarks from the city of Chester in 1895

Movement No. 20991

Case No. 20791

Caliber 45 mm., 15 jewels (8 in screwed settings), ebauche by Bahne Bonniksen frosted and gilt brass, three quarter plate, English lateral lever escapement, cut bimetallic balance, blued steel balance spring with terminal curve. The escapement is set, after Boniksen, on a 52 ,5' revolving carriage.

Diameter 57 mm.

Signature Dial and movement, case numbered and O.H for Oliver Hartley

Accessories copy of the chronometer observatory

Notes

Carousel regulator

A revolving escapement that is designed to reduce position errors in a watch and is mounted in a carriage similar to that of a tourbillion but differs from it in its slower speed of rotation and in having the fourth wheel contained inside the carriage.

Bonniksen, Bahne (1859-1935)

Danish watchmaker based in Coventry (Warwickshire) near Birmingham in England. Bahne Bonniksen built in the late 19th century watches, known as “carrousel” watches (British patent No. 21 421 of November 24, 1892; Swiss patent No. 7 965 of January 27, 1894), in which the carriage is driven not by the second-wheel but by the medium-wheel; its rotation is 52 minutes and 30 seconds. Bonniksen then produces “carrousel” watches with a centre-seconds hand driven by a carriage that rotates in 34 minutes, then, as early as 1903, tourbillon watches with a cage rotation of 39 minutes.