Invicta Men's INVICTA-3045 Pro-Diver Collection Grand Diver Silver-Tone. Stainless steel case 47mm diameter x 14.44mm thick; Exhibition case back; Blue dial; Luminous hands and hour markers. NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight: 310 grams. Stainless steel band, 215mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp. Mineral crystal; Screw-down crown; Unidirectional stainless steel bezel with blue top bezel ring; 300 meter water resistant: Suitable for professional marine activity and surface water sports.

This large, round watch measures 47mm wide (1.85 inches) and 17mm thick (0.67 inches) and it's made from solid surgical grade stainless steel. It also offers a skeleton see-through caseback and molded diving helmet logos on the end pieces connecting the silver stainless steel bracelet band as well as on the screw-down crown. It's topped by a blue unidirectional rotating elapsed time bezel with white markings. The blue dial face is supplemented by Tritnite luminous dotted markers and arrowhead-style hands (with seconds hand). Stylishly classic, internal workings are forged with variations of either Swiss chronograph or 21-jewel automatic movements and willingly navigate in depths up to 300 meters.

To do this, simply rotate the crown counterclockwise until it springs open. When you have finished setting the watch, the crown must then be pushed in and screwed back in tightly.

Overall, this process should not require a lot of effort or force. Automatic WatchesAutomatic watches donot operate on batteries. Automatic watches are made up of about 130 or more parts that work together to tell time. Automatic movements mark the passage of time by a series of gear mechanisms, and are wound by the movement of your wrist as you wear it.

Also referred to as self-winding, watches with automatic movements utilize kinetic energy, the swinging of your arm, to provide energy to an oscillating rotor to keep the watch ticking. They're considered more satisfying to watch collectors (horologists) because of the engineering artistry that goes into the hundreds of parts that make up the movement.

The round dial features a magnified date window at 3:00 and index markers at all remaining hour positions. The black and blue choices have silver-tone luminous markers and hands, while the yellow style has black luminous markers and hands. Bracelet: Stainless steel bracelet Movement: Automatic movement Crystal: Mineral crystal Crown: S.