#320 • IWC Portofino chronograph, ref 3731 mechaquartz w/B&P

Part of 261022 - "Fall Featured Auction" Horology, Jewelry & Coins - October 1 - 22 (timed auction by Jones & Horan Auctions)

High bid $1,300.00

Status: Available

Live bidding starts Oct 22, 2026 11:00 AM EDT

WW - IWC Portofino chronograph, ref 3731, mechaquartz, 35mm x 39mm to lug tips, 18mm lug width, original stainless steel screwed back case with round pump pushers, original riveted stainless steel bracelet, original glossy white dial with applied gold indices, three inset subregisters for minute recording, hour recording and subsidiary seconds, date scale along perimeter in blue, 25J cal 631, s#2427874, triple signed. Includes inner and outer IWC boxes, manuals, and extra links. CONDITION: Mvt: Running, chronograph functions and resets properly but is out of index, case not opened to inspect mvt condition; excellent-plus original dial with a few fine hls around pinion points; nearly mint hands; polished case shows very light wear, no major dents or dings; crown shows light wear; good glass crystal. Box and papers show medium wear, deterioration to interior material which is normal for boxes of this period. Estimate: $800 - $1,600 JH-80844