How to change a wrist watch band. Dublin Ca. The band is 16mm in width and simulated sharkskin dark blue. Thanks and enjoy! Buying and Selling. The serial number for this gem is 27, which places this piece to the year Sekonda Case material: To keep the G-Shock waterproof you should always lubricate the rubber gasket with silicone grease. A stunning dial, super clean movement and well serviced! Casual nylon strap quartz watch. Unless you just have a burning need to remove those bezel screws you can simply break off the old bezel and installl the new over them. Easy to Clean.