I'm attempting to identify the correct battery for a National Semiconductor Chronograph LCD watch that I dug up. I didn't see any particular identifiers on the back, or inside the watch when I took the back off. I've (hopefully) included some photos below. Does anyone have an idea of what the model number could be for this NS watch, or what type of battery it would require? I'd love to see if this little timepiece still runs.
Thanks,
edb314
ns-front.jpg
ns-back.jpg
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