Hong Kong, Nov 25, 2022
LOT 190
AUDEMARS PIGUET
REF. 25657 BA, EXTRA-THIN SELF-WINDING, PERPETUAL CALENDAR, MOON PHASES; “QUANTIEME PERPETUEL AUTOMATIQUE”; 18K YELLOW GOLD
HKD 96,000 - 192,000
EUR 12,200 - 24,400 / CHF 12,000 - 24,000 / USD 12,200 - 24,300
18K yellow gold, self-winding, round-shaped, extra-thin gentleman’s wristwatch, snap-on case-back, white colour dial with applied radial indexes and five horological complications:
· Instantaneous perpetual calendar
· Date of the month (subsidiary dial at 3 o’clock)
· Day of the week (subsidiary dial at 9 o’clock; indications given in English)
· Month of the year (subsidiary dial at 12 o’clock; indications given in English)
· Age and phases of the moon (subsidiary dial, graduated from 0 to 29 ½, and aperture at 6 o’clock)
| Grading System | |
|---|---|
Grade: AAA |
Excellent |
Case: 3 |
Good |
Movement: 2* |
Very good Overhaul recommended, at buyer's expense |
Dial: 2-01 |
Very good HANDS Original |
Brand Audemars Piguet, Le Brassus (Vallée de Joux)
Model “Quantième Perpétuel Automatique”
Reference 25657 BA
Year circa 1989
Movement No. 324 612
Case No. C 61 327
Material 18K yellow gold
Bracelet black leather AP strap
Buckle 18K yellow gold AP buckle
Diameter 36.1 mm.
Caliber 2120 / 2 QP, adjusted to heat, cold, isochronism and 5 positions, 21K yellow gold rotor, 38 jewels
Weight 57 gr. (approx.)
Signature dial, case and movement
Accessories later AP wooden fitted box
Notes
Audemars Piguet, Ref. 25657
In 1978, the Manufacture in Le Brassus presented the world’s thinnest self-winding wristwatch with perpetual calendar and moon phases indication.
Its movement, the calibre 2120 QP, has a diameter of 28.4 mm. and a height of 4.05 mm. It consists of 292 pieces.
A few rare examples of this reference have been equipped with a glass case-back (sapphire-crystal).
A similar watch is published in Brunner, Gisbert L., Pfeiffer-Belli, Christian, & Wehrli, Martin K., Audemars Piguet, le maître de l’horlogerie, Le Brassus, Audemars Piguet Editions, 1993, p. 272, ill. 457. A skeleton version is also referenced, ill. 458.