This is a Seiko ProspeX SRP637K1 Automatic Monster Baby Tuna diver's watch. It has been well-maintained by its original owner, who has worn it very little in the nine years of ownership. The watch features a stainless steel case, hardlex crystal, and 200m water resistance.

• Condition: Very good, with slight scratches on shroud, bezel, case, and bracelet
• Movement: Caliber 4R36, automatic with manual winding
• Case material: Stainless steel
• Crystal type: Hardlex