Bulova 1974 Accutron Date & Day

Watch was presented to my father in 1978. It passed to me in the late 90's. Was serviced in 2002. Case and crystal are not in the best condition. I have resisted restoration as I would like to keep and use it as my late father did. Biggest issue is that the strap was missing a couple of links and as such was very tight. A local watch repairer inserted an 'expansion' link. But this makes it uncomfortable to wear. Would very much like to source some original links to replace those lost. Update: Had the watch serviced and 'lightly' restored. New  correct crystal. Hands relumed and case lightly polished. The original crystal did not have a magnifier over the date. Thanks to a forum member I was able to source a NOS replacement.