Mechanics 3 min read
The simple science of quartz watches
Learn how a battery, a tiny crystal and a simple circuit work together to keep your quartz watch running with highly reliable accuracy every day.
G-Shock · G-MS
Ref. GMAS2100GA3A
The G-Shock Green Accent Colors takes a 24 mm strap: measure between the lugs and that is the only number you need. We list 18 straps in that width. Built for water, it wears naturally on rubber or a nylon NATO; a leather strap keeps it for dry days. With a 42.9 mm case and 200 m of water resistance, a thicker strap balances the case. Quartz movement. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
Width is a starting point. Check the case and end fittings before choosing.