Designed with a stainless steel case and brown leather crocodile strap with a vintage dial and blue steel 24-hour hand , this 39.5mm Grand Seiko Caliber 9S66 offers high precision and reliability that endures, with 72 hours power reserve. The accuracy of a mechanical watch depends greatly on the precision of its hundreds of individual parts. This is why all the components of each Grand Seiko watch are made by Seiko in-house and to the same high standards. To display GMT, the regular hour, minute and second hands are supplemented with a fourth hand that points to 24-hour marks around the dial, enabling time in different time zones to be displayed on the same watch. For international travelers, the GMT offers practical and easy-to-use dual time operation as well as the precision, legibility and beauty that are the hallmarks of every Grand Seiko watch. Featuring a see-through caseback, automatic movement allows for self and automatic winding capabilities and features 28,800 vibrations per hour and 35 jewels, with accuracy -3 to +5 seconds per day under static conditions. 30M Water Resistant.