With features like Tough Solar charging and Multiband 6 atomic sync, Casio’s G-Shock GW-A1000RAF-1AER  aviator watch sounds tech-y and flash, while in fact it meets hardcore military requirements as provided by Britain’s elite Royal Air Force. Working from a needs list gathered from RAF jet, helicopter and transport pilots, twin core competencies emerged: Triple G Resist, for resistance to extreme shock, vibration, and centrifugal gravity, and Smart Access, where hour, minute, and second hands are driven by separate motors, allowing rapid change between display functions, like timezones, stopwatch, or cabin temperature. All that and waterproof to 20 ATM! The RAF editiion is limited to 2000 units, for around £500 (about  $775).