Product Name: Prospex Diver Model Number: SBDC001 Wrist Size: Approximately 18cm Automatic and manual winding, hacking function, date display Rare first-generation Sumo without the X mark. Accessories: None Case, belt, bezel, glass Overall, there are scratches from use. The scratches on the glass, in particular, are difficult to capture in photos, so please assume there are more than shown. I used it as my main watch every day. The daily rate is around +60 to -90 seconds. The dial is black. Reference SBDC001 SBDC031 SBDC081 SBDC083 ----------- The following are the product specifications at the time of release. They do not guarantee the current condition. Movement: Cal.6R15 23 Jewels With manual winding mechanism, second hand stop mechanism, 6 vibrations Accuracy: +25 seconds to -15 seconds per day Approximately 50 hours of operation when fully wound Diameter: Approximately 45mm (excluding crown and crown guard) Thickness: Approximately 13mm Weight: Approximately 186g Functions: 200m diving waterproof Calendar (date at 3 o'clock, quick-set function) Curved Hardlex crystal Stainless steel case Screw-down case back Stainless steel belt One-push diver extender buckle PROSPEX SBDC001 Brand: SEIKO