![ALFRED COURVOISIER JONAIS | A FINE PINK GOLD HUNTING CASED DOUBLE DIALLED KEYLESS LEVER CALENDAR WATCH CIRCA 1890 [ 粉紅金雙錶盤日曆懷錶，年份約1890]](https://dam.sothebys.com/dam/image/lot/fe2f5aa0-65a0-479c-882c-95e06c3f1785/primary/extra_small)
Masterworks of Time: Abraham Louis Breguet, Horologist Extraordinaire 「時間傑作——阿伯拉罕・路易・寶璣：鐘錶鬼才」
Masterworks of Time: Abraham Louis Breguet, Horologist Extraordinaire 「時間傑作——阿伯拉罕・路易・寶璣：鐘錶鬼才」
![View full screen - View 1 of Lot 37. ALFRED COURVOISIER JONAIS | A FINE PINK GOLD HUNTING CASED DOUBLE DIALLED KEYLESS LEVER CALENDAR WATCH CIRCA 1890 [ 粉紅金雙錶盤日曆懷錶，年份約1890].](https://sothebys-md.brightspotcdn.com/dims4/default/b20cc99/2147483647/strip/true/crop/3542x3543+0+0/resize/385x385!/quality/90/?url=http%3A%2F%2Fsothebys-brightspot.s3.amazonaws.com%2Fmedia-desk%2F72%2F8c%2F02f36677445486129d74f94e41b9%2F054n10397-9y9ql-3-noreserve.jpg)
ALFRED COURVOISIER JONAIS | A FINE PINK GOLD HUNTING CASED DOUBLE DIALLED KEYLESS LEVER CALENDAR WATCH CIRCA 1890 [ 粉紅金雙錶盤日曆懷錶，年份約1890]
Lot Closed
June 16, 02:47 PM GMT
Estimate
2,000 - 3,000 CHF
Lot Details
Description
ALFRED COURVOISIER JONAIS
A FINE PINK GOLD HUNTING CASED DOUBLE DIALLED KEYLESS LEVER CALENDAR WATCH
CIRCA 1890
[ 粉紅金雙錶盤日曆懷錶，年份約1890]
• Movement: damascened nickel, lever escapement, bi-metallic compensation balance, calendar work on a separate plate hinged into the case and operated via motion work driven from the centre wheel, the calendar work advanced via a pin pushing a lever through an aperture to the damascened and pearled backplate of the calendar dial, signed with the stamp of Alfred Courvoisier Jonais
• Dials: front - white enamel, Roman numerals, outer Arabic minute ring, sunken subsidiary seconds, blued spade steel hands • second - white enamel with black outer ring for date, two subsidiary dials with black enamel chapter rings for day and month in French
• Case: pink gold, polished covers, the front with engraved monogram beneath a coronet, case back numbered 20702, front numbered 702, case maker's mark E surrounded by 4 pellets within a lozenge-shaped cartouche
diameter 54.5mm
To view shipping calculator, please click here
Alfred Courvoisier Jonais of La Chaux de Fonds received US patent 116316 for his "Improvements in Double Faced Watches" on 27 June 1871. The principle advantage of Jonais' system was in allowing the easy separation of the calendar work from the main watch movement - the calendar module simply 'unclipped' from the watch's movement allowing easy inspection of both elements and faster access for repairs.