Seiko Men's Prospex Stainless Steel Automatic-self-Wind Watch with Silicone Strap, Black, 21 (Model: SRPC44)

Automatic Diver

Manual and automatic winding capabilities

21,600 vibrations per hour

Power reserve: approximately 41 hours

24 jewels

One-way rotating elapsed timing bezel

LumiBrite hands and markers

Day/Date calendar

Screwdown crown and caseback

Case diameter: 45.0mm

Stainless steel case

Silicone strap

Water Resistance: Diver's Watch to 200 meters (660 feet). Follows ISO standards and is suitable for scuba diving.

Caliber 4R36