The bezel may or may not be original. It's dubious when anyone makes a bold assertion based only on opinion. And the crown story is another unknown. It's dangerous that there are some who feel they are so well-versed in bezels that they can state unequivocally that one of these stainless versions that are often reproduced in several ways and of which there are only a handful of examples that can be authenticated...as much as that is possible with any of these.(..and it's not really possible) is definitely original. The same danger exists in anyone claiming to know that a given DON bezel is absolutely legit. It's just not possible without a dated photo history...and even then could be faked.
It is interesting that the hands and indices are so closely matched, yet I see no one claiming it is an obvious sign of a re lum. I have never felt matched hands and dial are always a give away. Some originals match very well...others do not. This watch is a good lesson, if it is, in fact, original and the dial and hands are not molested. No one can know these things without having it in hand for a period of time.
There are no real experts with regard to 2915s, including the moon watch book guys. There is no one who has the answers, including Omega.