I’m doing a test over the course of the next month, trying to determine how good G-Shocks are at the basic function of timekeeping. After noticing how badly my DW-6600 keeps time (gains maybe over a minute per month), I’m curious as to how close my G-Shocks come to the plus or minus 15 seconds per month claim that Casio makes.
I manually synched the time of all of my G-Shocks, as well as my wife’s G-Shocks yesterday, to a GW-300 that had updated atomically the evening before. In theory, all of my G-Shocks are starting off within a second of each other. I’ll post up next month with the results. I will compare each G-Shock at the end of the month, to my reference GW-300 after a recent update, and tally how many seconds off each watch is.
I have a good variety of G-Shocks for the test. Some are older modules. Some are newer. Some are Tough Solar (all fully charged). Some are Atomic/Solar that won’t be auto-updating for the next month. Some are Baby-Gs. One is a Club-G.
So what do you all think? Will the older modules prove to be greatly flawed in comparison to Casio latest G-Shock offerings? Or will the older modules perform better, just because the modules are less complicated?
Not being a watch guru, there are factors that I don’t understand. I don’t know what effect the batteries have. Would a new battery perform differently than an older battery? Would the vibration of actual use effect the timekeeping more than a watch that is just sitting in a box?
Anyway, here are the watches being tested:
Brand Model Module
G-Shock DW-5600E 1545
G-Shock G-9000 3031
G-Shock GW-200TC 2422
G-Shock DW-6600 1199
G-Shock DW-6900 1289
G-Shock G-100 2327
G-Shock G-315RC 4368
G-Shock GW-500A 2688
G-Shock GW-1500A 3366
G-Shock MTG-930DA 2688
G-Shock G-3010 2453
G-Shock GW-2300B 2184
Baby-G BG-153 2288
Baby-G MSG-160D 2965
Baby-G BG-164 2286
Club-G GXS-690 2825
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The results are in, after 30 days of timekeeping. The accuracy of all watches represented, is in how many seconds greater than zero, that each watch had advanced after 30 days. None of the watches lost time. The accuracy of the test should be approximately +/- 1 second.
None of the results were remarkably unusual, although some were interesting.
My DW600 is definitely a lemon.
Many of the G-Shocks just barely fell into the advertised level of accuracy.
The Atomic timekeeping function of my GW-1500A appears to be utterly unnecessary. My G315 was also highly accurate. Actually, all of the Ana-Digi G-Shocks were very accurate.
The new Mudman did excellent.
I don’t really see any real correlation between accuracy and age, function, price or feature set, except for maybe the Ana-Digi’s. But the sample size is too low for any statistically accurate conclusions. It was a fun test though.
I've hit the 2 month mark now, with my test, and I thought I'd report in. The two month numbers showed a consistent level of accuracy to the one month numbers. If a certain watch was 10 seconds off the first month, it was 20 seconds off the second month. This is assuming that my eye has an accuracy level of plus or minus one second, when comparing two watches.
The only significant deviations occurred with the DW-6600 and BG-154.The DW-6600 was obviously faulty to begin with. The DW-6600 gained 30 seconds the first month, and 39 seconds the second month, for a total of 69 seconds in two months. This watch gains a variable yet large number of seconds every month.
I can only guess that I made a mistake last month, when recording the accuracy of the BG-154. It was 14 seconds fast last month, but only 11 seconds fast after the second month. I highly doubt that the watch gained 14 seconds the first month, and then lost 3 seconds the second month.