{"product_id":"1963-iwc-vintage-mens-full-size-automatic-cal-8531-isomura-watch-platinum-diamonds","title":"1963 IWC Vintage Mens Full Size Automatic Cal. 8531 Isomura Watch - Platinum \u0026 Diamonds","description":"The superior automatic IWC showcased in today's offering is a rare example made for the Japanese market encased in platinum and powered by the Albert Pellaton designed Caliber 853 movement.\u003cbr\u003e\u003cbr\u003e\nIts full size case has previously had a massive and striking diamond bezel added by a jeweler. Its approximately 40 brilliant diamonds weigh approximately 1.5 carats and are white and eye clean.\u003cbr\u003e\u003cbr\u003e\nThis mechanism's automatic winding system is a technical masterpiece, earning it high praise - Gisbert Brunner and Christian Pfeiffer-Belli in their work, Wristwatches Armbanduhren Montres-bracelets, proclaimed the 853x \"one of the best automatic movements ever built in Switzerland.\"  \u003cbr\u003e\u003cbr\u003e\nAnd the famous watchmaker Donald de Carle, in his book Complicated Watches and their Repair, stated that IWC's special automatic winding mechanism was \"a simple and ingenious system, well constructed and beautifully finished.\"\u003cbr\u003e\u003cbr\u003e\nIWC built it in 1963 at the same time they were building their famous Ingenieur line. These dress watches were more elegant than the pragmatic Ingenieur but shared the high-performance timekeeping qualities in normal wearing conditions. And compared to an Ingenieur, because they do not have a second inner back, the cases are thinner and lighter on the wrist.\u003cbr\u003e\u003cbr\u003e\nWhile the vast majority of these were made in stainless steel with some also being made in 18K gold and a few gold plated cases, only very few were made in platinum. \u003cbr\u003e\u003cbr\u003e\nIt is encased in the watch's original large contract case made for IWC for the Japanese market by Isomura and correctly stamped on the inside. It measures slightly over 36mm in diameter, a hair larger than even the size of a Rolex Datejust from the period.\u003cbr\u003e\u003cbr\u003e\nWith the exception of the diamond bezel, it has all of its original parts down to the hands and winding crown. It presents in beautiful condition. \u003cbr\u003e\u003cbr\u003e\nIts very rare platinum case presents as just short of mint with only the slightest bit of wear, light signs of previous polishing and slight signs of the bezel addition around the lugs.\u003cbr\u003e\u003cbr\u003e\nIts silver dial is original and untouched - it is just short of mint with very slight aging visible under magnification.\u003cbr\u003e\u003cbr\u003e\nA Master Watchmaker has recently overhauled its movement, which is very clean. We have also timed it on a machine that simulates it being worn on the wrist - it is keeping very accurate time on par with a new IWC in our testing.\u003cbr\u003e\u003cbr\u003e\nFor the finishing touch, we have equipped it with a brand new leather strap and aftermarket IWC style buckle making it ready for immediate enjoyment.\u003cbr\u003e\u003cbr\u003e\nAlso included is an IWC signed band and buckle only lightly worn of unknown origin that was on the watch when we acquired it. \u003cbr\u003e\u003cbr\u003e\nIncluded with the purchase is a one-year warranty on the movement and its function and a custom printed Connoisseur of Time Certificate of Authenticity.\u003cbr\u003e\u003cbr\u003e\nYour watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an extremely experienced team of four Master Watchmakers all of whom each have over thirty-five years of experience and a large number of parts. One used to be the watchmaker for an authorized Rolex dealership and was given \\ training by Rolex at their Beverly Hills Service Center. He also has done authorized watchmaking work for the Richemont Group's Service Center, IWC Schaffhausen, and many others.\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eManufacturer:\u003c\/b\u003e IWC \u003cbr\u003e\n\u003cb\u003eCity of origin:\u003c\/b\u003e Schaffhausen, Switzerland\u003cbr\u003e\n\u003cb\u003eSerial no.:\u003c\/b\u003e 1,694,355\u003cbr\u003e\n\u003cb\u003eYear built:\u003c\/b\u003e 1963\u003cbr\u003e\n\u003cb\u003eFunctions:\u003c\/b\u003e Hours, Minutes, Automatic, Sweep Seconds\u003cbr\u003e\n\u003cb\u003eDesigned for:\u003c\/b\u003e Men \u003cbr\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e Approx. 36.5mm wide (without crown), 44.5mm lugs tip-to-tip \u003cbr\u003e\n\u003cb\u003eCase condition:\u003c\/b\u003e Just short of mint with only the slightest bit of wear, light signs of previous polishing, one super light indention in the back visible at only certain angles, and slight signs of the bezel addition around the the lugs.\u003cbr\u003e\n\u003cb\u003eCase markings (inside):\u003c\/b\u003e Platinum, Isomura stamp, PM900\u003cbr\u003e\n\u003cb\u003eDial:\u003c\/b\u003e Silver soleil, signed International Watch Co. Schaffhausen and AUTOMATIC, faceted baton indexes, outer minute track, original and untouched, just short of mint with very slight aging visible under magnification\u003cbr\u003e\n\u003cb\u003eHands:\u003c\/b\u003e Original, \"dauphines\" \u003cbr\u003e\n\u003cb\u003eJewels:\u003c\/b\u003e 21 rubies\u003cbr\u003e\n\u003cb\u003eBand:\u003c\/b\u003e 1.  Teju lizard, aftermarket, fully stitched, padded, brand new and unworn with aftermarket IWC style steel buckle.\u003cbr\u003e\n2. IWC signed band and buckle only lightly worn of unknown origin - they were on the watch when we aquired it. \u003cbr\u003e\nWe also stock lizard and a variety of other straps in various prints, skins, and colors. Please ask us if you're interested.\u003cbr\u003e\n\u003cb\u003eCrystal type:\u003c\/b\u003e Acrylic, excellent condition\u003cbr\u003e\n\u003cb\u003eMovement:\u003c\/b\u003e IWC caliber 8531, self-winding, rhodium plated and decorated, 21 jewels, Breguet hairspring, shock resistant, precision regulator\u003cbr\u003e\n\u003cb\u003eServiced:\u003c\/b\u003e A Master Watchmaker has recently overhauled its movement, which is very clean \u003cbr\u003e\n\u003cb\u003eTimed:\u003c\/b\u003e Timed to precision on a state-of-the-art computerized system. We have also timed it on a machine that simulates it being worn on the wrist - it is keeping very accurate time on par with a new IWC in our testing. \u003cbr\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e 1-year international warranty. Please email concierge@cotwatches.com for details. Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an extremely experienced team of four Master Watchmakers all of whom each have over thirty-five years of experience and a large number of parts. One used to be the watchmaker for an authorized Rolex dealership and was given \\ training by Rolex at their Beverly Hills Service Center. He also has done authorized watchmaking work for the Richemont Group's Service Center, IWC Schaffhausen, and many others. \u003cbr\u003e\n\u003cb\u003eBox\/Papers:\u003c\/b\u003e BOX - Connoisseur of Time watch presentation box; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity\u003cbr\u003e\n\u003cb\u003eReturns:\u003c\/b\u003e 7 days full refund. 100% satisfaction guarantee\u003cbr\u003e","brand":"IWC","offers":[{"title":"Default Title","offer_id":44251689189465,"sku":"10658","price":5895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1219\/5194\/files\/1180228352_o.jpg?v=1785337773","url":"https:\/\/shop.connoisseuroftime.com\/products\/1963-iwc-vintage-mens-full-size-automatic-cal-8531-isomura-watch-platinum-diamonds","provider":"Connoisseur of Time","version":"1.0","type":"link"}