I'm unsure of the caliber number. The item "SERVICED TIFFANY & Co Pocket Watch Movement IWC International Watch Co 17J" is in sale since Sunday, August 19, 2018. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique".
The seller is "relichhunter724" and is located in Mission, Texas. This item can be shipped to United States, Canada, United Kingdom, Germany, Japan, Australia.