IWC International Watch Co, Schaffhausen, Da Vinci Perpetual Calendar Chronograph, Ref. IW3750, movement no. 2404066, case no. 2386378, sold in 1988 A very fine, superb condition, water-resistant, automatic, 18K yellow gold perpetual calendar wristwatch with white dial, luminous gold Baton hands, round button chronograph, 12-hour and 30-minute registers, moon phases and year indications, hooded mobiles lugs, leather strap and an 18K yellow gold IWC buckle. Fitted with a caliber C7906, based Valjoux, gilt finish, blued steel screws, self-winding, 36 jewels, shock-absorbers, hack mechanism. Snap on gold case back, correctors in the band, hesalite crystal, screwed crown. Dial, case and movement signed. Diam. 39 mm. Thickness 15 mm. Accompanied by the original fitted box, user manual, guarantee dated June 1988, booklet and after-sale service guarantee.