How accurate are the G-shocks?

I set mine when we went to daylight savings time and it is now 4 seconds off.
 
My G-SHOCK is DAMN accurate cosidering it's abuse level. It runs about 1or 2 seconds fast every month. an acceptable margine for me.
 
I have owned, probably a dozen Casio G-Shock watches through the years, and I have NEVER had one that lost or gained more than 6-8 seconds a month, and most were even better than that. The two G-Shocks that I have now will keep time with watches costing 10 times their price.:).
 
I'll have to get me a G-shock right away. And I've always thought they were crap when it comes to accuracy.

BTW, does anybody know if there is a G-shock model featuring:
1. Waterproof to 660 feet
2. Resistant to variations in temperature
3. Antimagnetic
4. Illuminated
5. Alarm

That's it. It's all I need.

Rs,
-Paul
 
Accuracy of watches.... Those atomic clocks are computer adjusted... time is not always a measure of equal time intervals... so... I knew this guy who had this G-shock... every few days, it would be a few seconds off... not consistently, one day it would be 5 seconds.. the next, maybe 1, and the next, 10.... well, he cursed and cursed... He hated it... Well, I offered him 10 bucks for it and took it home to check it against my other watches.. I matched it to one of my mechanical watches that was consistently 2 seconds fast per day... Well, that watch was actually +1 second a month... his computer was lagging the information he was getting from one of those internet "time" sites and was getting incorrect readings whenever he checked the time.

These watches are more accurate than many of the accepted comparison methods.
 
I own two G-SHOCKS the GAUSSMAN & MUDMAN,which i ware daily GAUSSMANS are hard to find, but what a watch! The MUDMAN is accurate to 1 or 2 secounds per month. Takes a beating its almost indestructible better than TIMEX in my opinion. DEPAUL except for the depth which im not sure of they are every thing youve asked for in your thread .Price range will vary MUDMAN around 75.00 to 125.00 depending .GAUSSMAN around 150.00 to 200.00 depending. Again the GAUSSMAN is hard to find but if you do grab it its a hell of a watch. Hope this helps check out some of the internet sites that sell CASIO watches.;)
 
The more complications you add to a watch the more you interfere with accuracy. If you go to www.casio.com you'll see some of their watches are specified within 15 seconds per month, others 30 seconds per month -- the difference is how many complications they have.

Quartz watches are affected by temperature a little, but the main factor other than complications is how accurately the quartz tuning fork is cut in the first place. Simple quartz watches have a very consistent rate of going, but exactly what rate is a matter of chance, within spec. They cut the crystal with a laser and then test it long enough to see that 95% or so are within spec. There are a few (expensive) quartz watches on the market with high-beat crystals and/or temperature compensation for greater accuracy, but the usual design has a crystal that beats at 32K (32768). In an analog watch that 32K is divided in half 15 times by a 15 gate counter circuit to produce one pulse per second, which runs a stepper motor that makes a 180 degree turn with each pulse.... Whatever brand you buy at whatever price, except for those few expensive watches that use a different design they're all the same and the accuracy you get is a matter of chance. It might be within one second a month if you're lucky or it might be twenty seconds a month off -- and the odds are the same whether it's a relatively expensive watch or a cheap one. There's very little motivation to improve accuracy because most people are satisfied with any quartz movement; the few fanatics like me who want better are a small market.

It has sometimes occurred to me a cheaper way to get a very accurate watch than to buy one of the better designs would be to buy about a dozen quartz watches when there's a sale at a discount store -- sometimes you can get pretty decent watches <$5 -- test them all and pick the most accurate one. YOu could give the others away for Christmas presents; most people don't care about accuracy....

The clock in your computer is quartz-controlled but that crystal is running a lot of other stuff too; that's why they're so inaccurate. There's a variety of software on the market to set it -- I've been using NetTime, which pings back and forth with all 144 different time servers to determine the lag and the variation in the lag, picks the best five or six of the bunch, and averages them. It's typically within <500 nanoseconds.

I can't say NetTime is the best, though -- there are about 50 or so different programs available and I've only tried a few of them. NetTime is free.

Time Synchronization Software
 
thanks for the excellent info. Very useful! However, now I'm even more confused what to buy ;)
 
I guess the bigger question is, what kind of accuracy are you looking for?

I have a G-Shock that has all the functions you spec'd.

It also has a wire cage over the bezel to protect it.

The model is DW003S-xx. (the xx signifies a colour choice (ex. 01, 02, 08, etc.).

A bit hard to find also, but it looks just like a Baby-G, but is full size. I got mine from a dealer on Ebay.

Under $80.

Hope this helps.

Mike
 
I just bought a Luminox Stealth and have had it about a month. Everytime I turn on my Garmin Etrex GPS, which is quite often (I use it in my car), it updates its time with the military satellites that they work off of and I set my watch with it to the second and it has been very consistant with my GPS, maybe only 1 or 2 seconds off.
 
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