Re: New 2019 Jem 7v finish
It's very normal for the inside of the monkey grip to be rough, I don't know why they do it that way but to some degree it is something you will see on all Jems. I have a 7V from 1994 and a 777 from 2017 and both have this, though it's not drastic or doesn't stand out especially.
All my JEMs from the early 90s through to my most recent ones which are early 2000s have the rough inside of the handle and the issue still with the notoriously difficult to get right jacket socket issues.
Looks like you’ve got a good one there