1680 Red Sub

Hi all, new to the whole Rolex world but figured this is a good source of information. I was handed down a 1971 Mark IV ( I think) Red Submariner, without bracelet, in need of some love. Its a 2.5M serial so am I right on the year?
Attachment 1477646

Attachment 1477647

Any additional info on the watch would be helpful. I am going to try restoring it since I don’t see many of these around anymore. My understanding is that the correct bracelet is a 9315 with 380 end links? Are bracelets even available anymore?

thanks in advance!

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