PATEK PHILIPPE. A RARE AND IMPORTANT 18K GOLD MINUTE REPEATING PERPETUAL CALENDAR OPENFACE KEYLESS LEVER POCKET WATCH WITH PHASES OF THE MOON

PATEK PHILIPPE. A RARE AND IMPORTANT 18K GOLD MINUTE REPEATING PERPETUAL CALENDAR OPENFACE KEYLESS LEVER POCKET WATCH WITH PHASES OF THE MOON
Signed Patek Philippe, Geneve, No. 866584, Case No. 332915, Ref. 880, circa 1980
With nickel-finished lever movement, mono-metallic compensation balance, adjusted to heat, cold, isochronism and five positions, 29 jewels, two polished hammers minute repeating on two steel gongs, under cuvette, silvered matte dial with applied gold baton numerals, three subsidiary dials indicating day combined with 24 hours, month combined with leap year cycle, date combined with constant seconds, heavy plain case with repeat slide in the band, case, dial and movement signed
52mm diam