IWC vintage model (Old International) Operation confirmed. The strap is a third-party product. Purchased in 2020 as an overhauled item. Dial color: Black Movement: Automatic winding I purchased it from an acquaintance, and there was no case or instruction manual. I don't know the detailed information such as the manufacturing year, so please consider it only if you can understand the details from the photos. As it is an old item, there are some minor scratches, but there are no noticeable ones, and I think it is a beautiful item.