【About the Product】 This is the SEIKO Weekdater model, the “Business A” 8346-8000. The Business A was a day-of-the-week display model sold in the late 1960s, targeting business professionals. Developed with the concept of a thin, compact automatic watch suited for work, it features a straight-line lug design for a stylish impression. Date adjustment is via the crown, and the calendar at the 6 o'clock position changes when the date is adjusted. (This is the original specification.) We offer high-quality vintage watches. 【Appearance】 ・Slight minor scratches overall 【Function】 ・Operates normally ※Regarding the accuracy of automatic winding watches, we do not perform precise mechanical daily rate measurements. While significant errors are unlikely, please be aware of this beforehand. ※Water resistance is not guaranteed as this is a vintage watch. 【About Product Descriptions】 Product descriptions are based on our subjective evaluation. Describing the condition of vintage items is often challenging. We will upload images highlighting any points of concern whenever possible; please review these. 【Important Information】 Import duties, taxes, and fees are the responsibility of the buyer. Before bidding, please check with your country's customs office regarding these additional costs. Delivery typically takes approximately one week from shipment.