The superior original automatic IWC showcased in today's offering is powered by the Albert Pellaton designed Caliber 8531 movement. This 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 8531 "one of the best automatic movements ever built in Switzerland."

And 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."

IWC built it in 1961 at the same 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.

It is in beautiful original condition - on the wrist it presents as just short of mint, and the lugs on the full size case are beefy and look unpolished with crisp lines.

Its awesome pie pan dial is original and mint. And its movement has been freshly cleaned and oiled and is running very true. For the finishing touch we have installed a new leather band making it ready for immediate enjoyment.

Included with the purchase is a one-year international warranty on the movement and its function, a custom printed Connoisseur of Time Certificate of Authenticity, and a new timing certificate.

Photos of the inside available upon request.

• Manufacturer: IWC
• City of origin: Schaffhausen, Switzerland
• Serial no.: 1,566,820
• Year built: 1961
• Functions: Hours, Minutes, Automatic, Sweep Seconds, Date
• Designed for: Men 
• Dimensions: 35mm wide (without crown), 42mm lugs tip-to-tip
• Case condition: Beautiful condition with crisp lines that look unpolished. Presents very nicely on the wrist. The only real wear are marks on the left side from a watchmaker trying to open the case. The longer lighter scratch could be polished out by a skillful jeweler. Please inquire if you would like our assistance. One small area of pitting to the case back. It is quite a bit less noticeable in person than it is in the magnified photos.
• Case markings (inside): International Watch Co., Swiss, Acier Inoxydable Staybrite, 1,583,420
• Dial: Blue, Signed International Watch Co. Schaffhausen and AUTOMATIC, faceted baton indexes outer minute track, expertly refinished
• Hands: Original, steel dauphines
• Jewels: 21 rubies
• Band: Leather, fully stitched, padded, brand new and unworn. We also stock lizard and a variety of other straps.
• Crystal type: Acrylic, excellent condition. Note the cyclops has been re-centered since the photographing.
• Movement: IWC caliber 8531, self-winding, rhodium plated and decorated, 21 jewels, Breguet hairspring, shock resistant, precision regulator
• Serviced: Yes, fully freshly cleaned and oiled.
• Timing: Timed to precision on a state-of-the-art computerized system. 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 experienced team of watchmakers both of whom each have over forty years of experience and a large number of parts.
• Warranty: 1-year warranty. Please email concierge@cotwatches.com for details.
• Box/Papers: BOX - Connoisseur of Time watch presentation box; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity; New timing certificate
• Returns: 7 days full refund. 100% satisfaction guarantee

We offer a 100% satisfaction guarantee for all of our watches. If you are in any way unsatisfied with the watch we will fully refund the purchase price anytime within 7 days after the watch has been received. Our goal is to exceed our client's expectations throughout the buying experience.

All watches are packaged carefully and mailed double boxed in specially constructed, reinforced shipping boxes designed for high value items. All watches are sent fully insured with signature required. Most of our domestic shipping is done through FedEx. At times we will also use USPS Express Mail, and we can accommodate most requests for your preferred carrier. International shipments are sent USPS International Express Mail or FedEx.

The purchase price will be the declared value of the merchandise on any required customs forms. The payment of all customs duties, tariffs, and taxes are the responsibility of the buyer.

Also note that water resistance of vintage watches can no longer be guaranteed and is not covered under the watch's warranty. We do not recommend getting a vintage watch wet, even one that was originally designed to be waterproof.

To get an idea of how this watch will look on the wrist, please use the Watch Sizing Guide