I think it would look good on a dark leather strap or maybe any of the Haveston straps. But also many of the other Seiko bracelets should fit with the same lug width and case shape. Also there are a number of good Seiko forums who might be able to help you out for extra links.
I would however remove the battery asap, no matter what you decide to do with the watch, if it leaks it could be much more expensive to bring back to life.
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