Help with battery change

I found these two old watch of mine in the house after many years from the 1990s. I've didn't have the same appreciation I did back then as now for watches and so these two holds a lot of sentimental values for me.

I would like to figure out how to change the batteries on these two and clean them up to working order. The first is just a square two tone Seiko. The second is a G Shock MR-G 200-T titanium.

Does anyone know to change the batteries on these guys?

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Very cool! I bet there's a ton of videos on youtube if you type in model number on the back of the g shock. I've use vinegar to clean battery acid off like flashlight contacts, but watch stuff like that is a bit daunting to me because it's so small!

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Can you post pics of the casebacks? I change the batteries in my quartz watches when needed, but different tools are required for different casebacks.

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Well that was a fun couple of hours. I not only opened it up to replace the battery but also took the opportunity to take the entire movement out to do some light (air) cleaning of the debris inside the case.

II had to run all over town to find a SR920W (Seiko) and a CR1616 (gshock) batteries. That was the not fun part.

Overall thoroughly had fun. The Seiko quartz just needed a sharp prying tool to open the case back. The gshock just needed a good twist with a case back remover.

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And yes, both watch are still in great working order after fresh batteries installed.

The bracelet and case back of my watch were disgusting from all the years of wearing. I soaked them in light soapy water and scrubbed them down.

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And you thought you needed help.👏👏👏

But for real great job. And I personally hate press back cases. They're alway a pain for me to open.

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Even a battery change and a clean bracelet can leave you feeling like you've achieved something and revived a cherished watch? It certainly works for me. Good job!