526s are very different and go to a completely different model. Some people have “fit” them on but they fit poorly and go over and scratch the caseback.
Bracelets can be correct for various models/references. It’s the Endlinks that are specific and fitted to a single or small number of references to provide a good fit against the case.
is there a chart or reference that says which end link forgoes with which case? Or is this wisdom randomly dispersed through the Omega Forums and, to a less accurate extent, google?