Brand Audemars Piguet, Le Brassus (Vallée de Joux)
Model “Royal Oak” so-called “Jumbo” “B-series”, No. 390
Year circa 1980
Reference 5402 / 344 BA
Movement No. 197?594
Calibre 2121 / 1, 36 jewels
Case No. B 34 716
Material/s yellow gold (18-carat)
Bracelet integrated yellow gold (18-carat) with white gold (18-carat) deployant clasp
Dimensions 47.8 x 39 mm.
Ø 39.9 mm. (bezel)
Thickness 7.1 mm.
Length 175 mm. (approx.)
Weight 172.2 gr. (approx.)
Signature dial, case and movement
Accessories later “Royal Oak” fitted box and outer box Yellow gold (18-carat), self-winding, tonneau-shaped, gentleman’s wristwatch, with one horological complication:
• Instantaneous date of the month (aperture at 3 o’clock) Case: two-piece, polished and satin-finished, water-resistant with case-back screwed by eight screws, octagonal ship’s porthole-shaped bezel screwed by eight hexagonal “nuts” screws, hexagonal polished and satin-finished crown. Dial: grey colour “tapisserie”, with applied radial yellow gold luminescent indexes, “AP” logo at 12 o’clock; yellow gold luminescent “Bâton” hands. Movement: calibre 2121 / 1, adjusted to heat, cold, isochronism and 5 positions, 36 jewels, 21K yellow gold rotor.
