"treated to a performance valve job by JMS Machine"
Open to interpretation I guess, but it isn't a stock type valve job. At least 3 angle possibly more. Either way doesn't make sense to do a 3 angle and leave the ledge without blending it into the bowl.
Ummmmm.......a stock factory valve job IS a three angle......at least in the head. I love when shops act like they're giving you more than a regular valve job when grinding three angles in the head, because they all come like that. lol