Patek Philippe Perpetual Calendar Chronograph 3970E

PATEK PHILIPPE fine and extreme rare, astronomical chronograph with perpetual calendar reference 3970E, manual winding, 18k yellow gold case including original leather strap with original 18k yellow gold buckle, screwed down solid 18k yellow gold case back, display of hours, minutes, constant second, day, date, month, moon phase, 24-hours, leap year indication and chronograph, correction in case inserted, silver dial with raised gold- indices, gold hands, fine finished rhodium plated movement, calibre CH27-70Q, 24 jewels, fausses cotes decoration, stamped with the Seal of Geneva, diameter approx. 36 mm, original box, certificate of origin, setting pin and extract of the archives enclosed, produced in 1992 and sold in January 1993, condition case 2, condition movement 1-2, discontinued model, property of a collector