Invicta 3644 is not a very large watch in the case of diameter 40mm and thickness of 13mm. The case is made of stainless steel, bezel, buttons, crown and middle part of the bracelet is IP-covered with 23K gold. The dial glass made of synthetic sapphire Flame Fusion. The Bezel does not rotate. The Glass is a little above the level of the body. There is a date window between 4:00 and 5:00 hour marks. The crown is threaded, the buttons also have a threaded limiter accidental pressing. The Chronograph with accuracy of 1 second up to 60 seconds. It has a Split Time feature. Right sub-dial for 24-hour time format. This watch weighs 8.8 ounces/ 250 grams. The waterproof 660 feet/ 200 meters.