This one is a one of one prototype. As far as I know, the run will be different, with a smaller case and automatic movements. Further details are only known by Joe....he's sneaky like that
I don't experience any rubbing of the crown on my wrist. The fit, for me, is great and I often times forget that it's there. The balance is really good and the concaved underside really makes the watch friendly with the wrist.
Added: Forgot to reply to Tan's question. The engraving on the end of the crown is a turtle. Same one as on the underside of the case. A really cool design that Joe did which includes the "52T" in it. If you look close you'll see it. I'll post a pic of the underside which will be more clear.