SEIKO Superior World Timer 100M Automatic SRP037K1
Caliber: 4R16 Automatic Movement, 22 Jewels Made in Japan , 50 Hours
A window at the 3 o'clock hour reveals the automatic day calendar.
Metal:  Solid Stainless Steel 
Size: 45mm with crown
Band: Solid stainless steel bracelet
Water resistance to 100 meters/ 10 bars
Glass: Top Sapphire crystal
Dial: Black
One year International warranty