Movement: BUREN GRANDPRIX (see photo 7) Case width: Approximately 20.5mm (excluding crown) Case length: Approximately 31mm Case length (including lugs): Approximately 40.8mm Lug width: Approximately 16mm Belt: Accurate Form open-end, with little wear Daily rate: ±2-3 minutes, varies depending on usage Although not written on the dial, this is a rare BUREN watch with "BUREN GRANDPRIX" engraved on the movement. Furthermore, it has a unique specification with an inner case in this shape, which is rarely seen. The case shows age-related changes, but the dial and movement are very well preserved. Currently, there is no significant deviation when laid flat or worn, but I am not aware of any maintenance history, so please have it inspected by a specialist if you are concerned. The daily rate may vary depending on the individual's usage, so please consider it as a reference. There are no accessories. Everything in the photos is included. ■ Please check the images carefully before purchasing as this is an antique item. ■ Please refrain from purchasing if you are sensitive to the condition of antique items. ■ Please understand that this item has been in someone's possession before purchasing. ■ We do not accept returns or exchanges for customer reasons, such as ordering the wrong item or a different image. ■ Please consider this item with no claims and no returns, including measures to prevent substitution. ■ We cannot respond to any problems or damage during transportation. ■ Please refrain from purchasing using a proxy service. We will not trade with official accounts. If you have any questions, please ask in the question section.