Case Material: Alloy Water Resistance: Non-waterproof Style: Vintage Movement: Quartz Watch Driving Method: Electronic The package includes a pocket watch and a gold necklace chain with a hook. Classic Pocket Watch: Roman numeral markings, beautiful patterns, and a vintage design, making it a really good fashion accessory. - Body Diameter: Approximately 4.5cm - Chain Length: Approximately 80cm How to Open: The quartz pocket watch has a simple design. Press the crown on the top of the watch to open the front plate. Pull the crown away from the base of the watch and turn it clockwise until the correct time is set.