Seiko dive watch - s/n 530687 8123-7190
What battery does this watch take?
Unfortunately, the Seiko website does not have a serial number lookup, so you'll have to identify the model. The "8123-7190" is what Seiko calls the "caliber code." Entering that on the page linked below will narrow down the model number list for you. Clicking on the link for your model will give you the instructions in PDF format. The instructions for your model tell you what size battery to use. For example, the manual for the 8F32 states on page 11 that the battery size for that model is CR2412. (Note - be sure to get the correct instructions; different models have different battery sizes.) "Automatic" Divers watches have no battery, they are powered by a spring mechanism.
on Sep 28, 2018