Question about Casio G-Shock GW300CA-1V Wrist Watch

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Time change eastern day light time change was on the morning of 11/4 and i can't change the time on the watch.  My watch did not automatically go to EST. How do I get it to?

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Use this page to download a copy of CASIO watch manuals in PDF format. To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.

You will need a pdf reader on your pc, you will find all instructions in there.

If you don't have a pdf reader you can get one from

Posted on Jun 10, 2008


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Just bought a Lacoste watch,and I am puzzled why they stress the importance of not changing the date between the hours of 11.45pm and 2.00am?.

If you change the date between those hours, and the watch is set for the correct time, it may automatically roll the date forward yet again. It could mess up the internal mechanism for changing the date. The date starts to change around 11:45 PM and can take a good long while for it to fully "engage" the new date, which is why they say to wait til 2:00 AM. The internal mechanics that change the date are very sensitive. If you force it to change the date while it is automatically trying to change it, it can off-set the little gears and they may not function correctly in the future. So just make sure the time on the watch is not between 11:45 PM and 2:00 AM when you change it. The best thing to do is to change the date to the day PRIOR to the day you want (for example today is the 21st, set it to the 20th, then advance the hour / minute hands past midnight so it automatically rolls into the 21st, and then you will know if you are on AM or PM).....

But just avoid setting it between 11:45 PM and 2:00 AM as they mention.

Please make sure you rate my answer 4 thumbs up, it is extremely important to me. I would be forever grateful if you could do so. If you need more help on this question please just respond to my answer here and I will get right back to you.


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Cannot delete

My watch has a tiny letter just to the right of the signal strength indicator. In my case it is a C because I live in the central time zone. Perhaps you live in the eastern time zone? The E may not be short for ERROR but instead stands for EASTERN. Its called the E/C/M/P indicator.

I don't know if you have had a chance yet, but the manual that I talked about previously does show this feature on the first page. Its called "Operation Guide 2608 2638 2688". Your watch almost certainly has a 2688 module.

I hope that was the E that you were talking about.

As for the signal sign, you want it to be there. You need to worry when its absent. :-) I think all waveceptors are like that.

I hope that helps.

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Hold down the button for 2 seconds until the time zone abbreviation & zone flash the keep pressing the button until your correct time zone is displayed. Then wait about 8 seconds for the watch to return to normal display. Then you just have to wait until it picks up the signal & sets itself. I hope this helps.

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Use this page to download a copy of CASIO watch manuals in PDF format. To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.

You will need a pdf reader on your pc, you will find all instructions in there.

If you don't have a pdf reader you can get one from

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