You are of course correct. The '85 is officially for the GMT, I think? In any event, it will fit a 2254.50.00.
There is another rubber strap officially for the 2254.50.00... I can't see a number on the rubber part but the clasp is 94531803, maybe
@Archer can cross-reference it.
The 98000037 is alleged to be rubber but not waterproof!
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