Antiquorum Auctioneers since 1974

Geneva, May 10, 2026

LOT 298

FABRIQUE PETERSBOURG, FRANCE, MNEMONIC PERPETUAL CALENDAR MADE FOR THE RUSSIAN MARKET, 18K YELLOW GOLD

CHF 6,000 - 10,000

HKD 60,000 - 100,000 / USD 7,600 - 12,700 / EUR 6,500 - 10,900 / JPY 1,210,000 - 2,020,000

TO BE SOLD WITHOUT RESERVE

Sold: CHF 4,000

A very fine and rare, 18k gold, manual wind double face, key-winding pocket watch. mnemonic perpetual calendar.


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Grading System
Grade: AAA

Excellent
Case: 3

Good
Movement: 3*

Good

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

Good

HANDS Original

Brand Fabrique Petersbourg, France

Year Circa 1770

Caliber 35 mm., 7 jewels, gilt brass full plate, lever escapement.

Diameter 48 mm.

Weight 100 gr.

Signature Dial

Notes

The mnemonic calendar helps you remember month lengths. Use the rhyme: “Thirty days have September, April, June, and November; all the rest have thirty-one, except February alone”. Or use the knuckle method: make a fist, count months on knuckles and spaces—knuckles = 31 days, spaces = 30 (except February = 28/29).