Patek Philippe Perpetual Calendar 3940 '1st Series' NEW OLD STOCK

Patek Philippe 3940 First Series, this 3940 first series was made in 1985 and was the 52nd 3940 off the production line making it months away from the last perpetual calendar reference 3450, 18k yellow gold case is in immaculate original condition and appears to be unpolished and in new old stock condition, the case has developed a charming warm patina, the watch is still on its original strap and the original 12.5mm buckle, hallmarks at 9 o clock are clear bold and defined, original 18k yellow gold tang buckle, automatic Patek Philippe caliber 240 Q movement, perpetual calendar (english), moonphase, leap year indicator has developed a rich patina, dial has the iconic sunken sub dials unlike dials of the later series, dial is free of flaws, glass crystal, original Patek Philippe caseback sticker still in tact and clean, size 36mm, thickness 8mm, New Old Stock condition with original Patek Philippe box (interior has deteriorated over time which is common with Patek boxes of this age), original leather booklet with instructions, original lizard strap, setting pin (with same case patina), original tag, original certificate dated June 1985.