Rolex calls these bracelets 'capped-gold', but you can use whatever term you prefer. I have only seen this bracelet once before on a gold Air King 5520, which is itself rather rare.
There is some logic in your premise, but I have never seen Rolex fit Oyster pushers to a non-Oyster case & I doubt they would ever do that either purposely or by mistake. That said, I have little doubt that there are gen Daytonas out there that have been 'upgraded' (by non-Rolex watchmakers), but I think that anyone with more than a rudimentary knowledge of vintage Rolex would (correctly) view such a watch with great suspicion & would assume, also, that the watch is likely a fake or franken. Since DW's cases have 1 of the generally reliable marks of a gen (asymmetrical pushers) & gold Newmans are such oddities anyway, my watch would need to have some kind of glaring mistake for most WIS types to recognize it as a franken. Unfortunately, Oyster pushers on a non-Oyster case is 1 of the 1st things any Rolex WIS looks for, so getting the correct pushers installed are at the top of my to do list.