Watch: Portuguese Chronograph RattrapanteIWC SCHAFFHAUSEN. Reference no. 3712, case no. 2590217. 750 yellow gold (18 ct). ø 41 mm. 108 grams. Hand-wound. Caliber 76240. with 27 jewels. Sapphire crystal, silver dial, applied gold Arabic numerals, gold hands, blued steel chronograph hands. Subdials for small seconds and 30-minute counter. Rattrapanten pushers at 10, chronograph pushers at 2 and 4. Original leather strap with gold pin buckle. Warranty card, year of sale 1996, instruction manual. Original box, carton Watch not working, service needed, inner coating of the box defective. * Partner auction Bergmann. Provenance : estate of a private collection.