Made in October-December 1986 [as indicated by the case back engraving] SEIKO DIVER QUARTZ 150m Ref-6548-6000 [marked as 600LT] Unisex/Boy's Size Currently running, but I'm sorry, I don't know when the battery will die. I am the original owner. The strap is the original one from when I bought it. There were two strap keepers, but one is missing, so there is only one. There are no particular problems with use. _______________________________ 〇 Case, Band, Size, etc. Dial Color: Black Case Material: Stainless Steel Crystal Material: Stainless Steel Strap Color: Black Strap Material: Urethane Band 〇 Dimensions Please check the scale in the photos as these are amateur measurements. Approximate size ↓↓↓ Case Size: Approximately 38mm (excluding the crown) Wrist Circumference: Approximately 13.5-21mm Strap Width: 19mm 〇 Watch Specifications Bezel Shape: Bidirectional Rotating Crown Shape: Screw-down Case Back Shape: Screw-back Band: Original from the time of purchase, marked GL13A19. Condition Details: One owner, and I used it with great care. There are some scratches on the bezel and case back. The day of the week can be set in Japanese or English, and can be fast-forwarded with the crown. Also, Saturdays are displayed in blue and Sundays in red. Despite its small size, it is a full-fledged diver's watch with a sophisticated design and high fashionability. *Please note that this is a used item from the original owner, and it is a vintage item. Also, we are very sorry, but we do not accept returns after purchase. Thank you for your understanding. Thank you for looking.