Submariners were sold with different bracelets as an option including a Jubilee option , Rolex did do special orders but the 7836 was never a replacement for the 9315, the 9315 was replaced with the 93150. The C & I never had a 7836 designation, I think you are confusing it with the 7206 which was only used on the Swiss rivet, never the C & I. Also, riveted bracelets were produced well into the 70s using the USA C & I.
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