Patek Philippe Perpetual Calendar Chronograph 3970

Patek Philippe. A fine and rare 18ct gold perpetual calendar chronograph wristwatch with phases of the moon and Certificate of Origin, Ref:3970, Case No.2919333, Movement No.876291, Sold 23rd December 1992 24-jewel Cal.CH27-70Q chronograph movement adjusted to heat, cold, isochronism and 5 positions, Gyromax balance, Geneva stamp of quality, silvered dial applied gold faceted baton numerals, subsidiary dials for 30 minute register incorporating 24 hour indication, 12 hour register with leap year index, date ring with aperture for moon phases, day and month in two apertures below 12, gold baton hour and minute hands, blued steel chronograph hand, screw back case with concave bezel and downturned lugs, fitted leather strap with 18ct gold Patek Philippe buckle, together with fitted presentation box, outer card, leather wallet and Certificate of Origin , case, dial and movement signed 35mm.