In the search for a “SHTF-Worthy” watch that doesn’t cost an arm and a leg, and can keep going indefinitely without battery changes (solar powered), is water proof to 200 meters (overkill, but means rain and submersion won’t hurt it), has the ability to track Zulu time (Greenwich Meant Time) and local time, is very accurate (automatic nuclear time adjusted), lightweight, and has a good amount of alternate functions, the Chief Instructor has been using this one. The only thing it’s vulnerable to is an EMP (Electromagnetic Pulse) event, and in that case, a good, old fashioned, wind up watch will have to suffice, unless, of course, you keep a spare Stealth in a Faraday Cage.
It was purchased used, on eBay, almost new. The previous owner didn’t like the way it felt for some reason. Shipped for $70. It retails for anywhere from $95 to $300, outlet dependent, and on Amazon, you can get them for about $105.
Worth. Every. Penny.
Here are the specs:
- Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China)
- Receives time calibration radio signals which keep the displayed time accurate
- Auto receive function up to 6 times per day (up to 5 times per day for China)
- Manual receive function
- Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC
- Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, BPC 68.5kHz
- Tough Solar Power
- Shock Resistant
- 200M Water Resistant
- Full Auto EL Backlight with Afterglow
- Moon Data (moon age of the specific data, moon phase graph)
- Tide Graph (tide level for specific date and time)
- World Time
- 31 times zones (48 cities + UTC), city code display, daylight saving on/off
- 4 Daily Alarms and 1 Snooze Alarm
- Hourly Time Signal
- Countdown Timer
- Measuring unit: 1 second
- Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
- 1/100 second stopwatch
- Measuring capacity: 23:59’59.99”
- Measuring modes: Elapsed time, split time, 1st-2nd place times
- Battery power indicator
- Power saving function
- Button operation tone on/off
- Auto Calendar (pre-programmed until the year 2099)
- 12/24 Hour Formats
- Accuracy: +/- 15 seconds per month
- Storage battery: Solar rechargeable battery
- Approx. battery life: 9 months on full charge (without further exposure to light)
- Module 3200
- Size of case/total weight
- GW7900B 52.4 x 50.0 x 17.7mm / 71g
So far, this is the way it’s being used:
- UTC/GMT where the day/date would be at the top, right under the solar collector.
- Local time in DST
- 24 Hour Format for both
- All tones muted
- Automatic Time Adjustment (Standard v Daylight Savings)
- Backlight time lapse – 3 seconds on
- Wrist tilt – Watch stays dark in the dark unless you bring your wrist up parallel withe the ground and then tilt it towards you 40 degrees, then the backlight comes on for 3 seconds.
- Manual light – Pushing the ‘G’ button activates the backlight
Haven’t had the need yet to explore the other functions, but have been impressed with how light it is, and because the face is 50mm or so, it has a couple of ‘wings’ under the base that stabilize the watch so it doesn’t slip. Nice touch.
This would be a great NPT watch