BLANCPAIN. A PLATINUM AND 18K GOLD SELF-WINDING PERPETUAL CALENDAR SPLIT-SECOND CHRONOGRAPH WRISTWATCH WITH PHASES OF THE MOON
Signed Blancpain, Model Three Precious Metals No. 1, Ref. 5581, circa 1985
Cal. 5581, with nickel-finished lever movement, 28 jewels, the white dial with applied Roman numerals, three subsidiary dials indicating month and leap year, date and 30 minutes register, day and 12 hours register, sector for phases of the moon and the lunar calendar, the circular platinum case with stepped gold bezel, two chronograph buttons in the band, split second mechanism operated by button at 10, snap on back, together with an 18k gold Blancpain buckle, case, dial and movement signed
34 mm. diam.