Casio G-Shock Mudman Super Dual Illuminator Men's Quartz 52mm Digital Watch G9000-1V on Amazon"/> Defy limitations and redefine durability with the highly-rated Casio G-Shock Mudman Super Dual ...

[Matteo] has been a fan of the Casio F-91W wristwatch virtually since ... and extremely long battery life thanks to a modern quartz crystal and has just about every feature needed in a watch ...

The Casio G-Shock is an icon for a reason ... The time is controlled electronically from a quartz crystal, just like all manner of other quartz watches out there. It's accurate to +/- 15 seconds ...