Battery change for a 90s mid size blue Bond

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Can't find much online to tell me what I need to purchase online, to remove case back, what battery, lube? Can anyone point me in the right direction without having to send it off?
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Is there really nobody on here at all that changes their own battery, Everyone has it done elsewhere?
 
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Don’t be surprised at the reluctance of a lot of folks to answer such elementary questions as you have asked. You obviously have no clue about cell changes on expensive, quality watches! We wouldn’t be doing you a favour to encourage you to wreck your Omega. By the time you check the prices on what you need to do a proper, complete job, including a water resistance tester, you’ll be glad to have someone do it for you.
 
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Local jeweller was lousy, battery change didn't even last the year, and can't post it to Omega and it's not that precious.
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