IWC rare and early 14k pink gold wristwatch

IWC rare and early 14k pink gold wristwatch, Switzerland around 1915, manual winding, smooth hinge case, lugs later, hand-setting by pusher at 4, two piece construction enamel dial with Arabic hours (hairlines), blued spade hands, constant second at 6, gold-plated movement calibre 64, 15 jewels, 3 screwed chatons, compensation-balance with Breguet- hairspring, original winding crown, diameter approx. 30 mm, leather strap with gold plated IWC buckle, overhaul recommended at buyer's expense, condition movement 2, condition case 2-3, from the estate of a collector