This item is a 1977 Seiko Grand Quartz. Model number: 4843-8110. Comes with a rare original belt. The battery was replaced and the glass was changed at a watch store in December 2025 (Reiwa 7). The belt is a Grand Quartz (GQ) original. It's a cool watch. The Grand Quartz is popular both overseas and domestically. Please use the quick calendar advance function only between 6:00 and 18:00. Please refrain from purchasing if you are sensitive to scratches or scuffs. This watch looks great with both suits and casual wear. Thank you. We are also listing many other items, so please take a look. Please note that we do not accept cancellations after purchase.