Citizen model number

Not available anywhere. Service Centre repair only. When you do the case gasket, you do the button gaskets at the same time.

https://www.google.com/search?q=citizen+AT4010-50E+gasket


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Similar model free manual online:

https://www.manualslib.com/products/Citizen-Skyhawk-Jr3080-51l-2333078.html

Citizen Skyhawk JR3080 51L Manuals

Citizen watch manufacturer web site instructions:

https://us.citizenwatch.com/us/en/setting-instructions.html

Do you mean, you haven't been wearing that watch but to put it in the drawer for a long time?
If so, to recharge the battery, just put your watch outside or anywhere it can catch the sun ray or day light. After few hours or about a day, the battery has been re-charged and your watch will work.
If it still doesn't work after doing that, buy a new watch. Don't bother to repair the watch or to replace the Eco-Drive battery, because of the cost.

Hi, This watch is Calibre C651, same as Model #JR3090-58M (Promaster Air Collection - Blue Angels Skyhawk). C651 is not available on Citizen website, but you can use Calibre C650 instructions. Download PDF manual and follow instructions on page 3. They are pretty detailed, so take your time, and you should be successful. If you don't have the manual, Try this link:
http://www.citizenwatches.com.au/instruction-manuals

Take the four-digit Calibre number (C651 or C650 in this case) from the back of the watch, enter it, and download a PDF of your watch setting-instructions/manual.
I hope this helps you. Thanks, Bill

Hi, I'm not familar with that model number, but I believe it's the setting procedure as the Skyhawk C650-C651 Caliber. C651 is not available on Citizen website, but you can use Calibre C650 instructions. Download PDF manual and follow instructions on page 3. They are pretty detailed, so take your time, and you should be successful. If you don't have the manual, Try this link:
http://www.citizenwatches.com.au/instruction-manuals

Take the four-digit Calibre number (C651 or C650 in this case) from the back of the watch, enter it, and download a PDF of your watch setting-instructions/manual.
I hope this helps you. Thanks, Bill

http://www.citizenwatches.com.au/instruction-manuals

You will need the calibre number on the back of the watch but try this citizen site.

The address of UK center for Citizen is below



CITIZEN WATCH (UK) LTD.
BERKSHIRE
P.O. BOX 161, Wokingham, Berkshire , RG41 2FS
TEL: (0118) 936-8855 / FAX:(0118) 989-0536
[email protected].

Find manual here: http://www.scubastore.com/mergulho/citizen-promaster-sensor-al0034-02/335/p Cheers

http://www.hurleyrobertsservice.com/v2/web/index.php

Here is the link to Citizen Authorized service centers, I am sure they can open the watch. Sometimes it is just a matter of having the right tool. I have several Citizen watches that are not supposed to be opened by anyone other than citizen. Good luck and I hope that helps.,