Crystal

[Grimoald]

Hello everyone, I’m new here.
I have one question. I bought this used watch almost a year ago. It’s a Rolex OP Date ref. 15200.
I noticed this crystal is a bit different than other crystals of this model I have seen online, and I wanted to ask if it may be aftermarket, and if there is a way to tell. The edge looks a bit “off” to me.
I don’t really care if it is aftermarket or not, but when I asked my watchmaker he told me that it’s probably not, since he trusts his sellers and nobody never had issues. He offered me to swap my watch with another one he has if this crystal thing really bothers me (datejusts, roughly the same price).
I have no reasons to think he’s lying, maybe he just doesn’t know.

What do you think?

I don’t want to sell it so the “value” thing does not really bother me.
Have never seen any moisture inside, btw.