Brand: IWC Model/Reference: Ingenieur Perpetual Calendar IW3540 – Yellow Gold Size 34mm (wears like a 36mm due to the lug design) What’s Included/Accessories: This is a full set. You will not find a more complete set than this IW3540 as I purchased it from the original owner. This set includes the watch, aftermarket high end strap, box (typical of this era, the box is peeling), papers, invoices, various pamphlets, century capsule date wheel (for replacing every 100 years or so), all sorts of sales literature that accompanied the watch and service papers. Operational Condition: The watch was fully serviced in May 2020 by IWC under the previous owner. Watch currently runs well and keeps excellent time. As always, YMMV. The only issue is that I recently and accidentally turned the century wheel to the next century (i.e. 2124) – I have always been told that I am a man ahead of my time (ha-ha) – but any competent watchmaker can reset the year. Cosmetic Condition: The watch is in excellent preowned condition. Very light wear marks but that is expected of a solid gold watch. Overall, the watch presents well and is in great cosmetic condition. Price: $10.5 k Trades: Only open to automatic Patek Philippe Calatrava (36mm and above), will add cash on my side Payment Methods: PayPal F&F only (no G&S), bank wire, Zelle or Venmo Reference/Feedback: Dozens of positive feedback - WatchUSeek Feedback – Username: Willing86 42 Transactions on Reddit WatchExchange – Username: WL039097 Pictures Incl. Time Stamp: [https://imgur.com/a/sjwyRh3](https://imgur.com/a/sjwyRh3)