1. Is that the correct size battery?
2. Is it a new battery within the expiration date and does it check out for voltage?
3. Did you clean the contacts? Is the brass tab actually contacting the battery?
4. Did you install it with the correct polarity? The battery case or watch back should indicate which side goes up, but it is usually the + side. See the picture below.
5. After all of that checks out and it still doesn't work momentarily short the installed battery to the movement with a pair of tweezers.
6. If that fails I would say you have a dead movement, although that is without actually seeing it.
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