If you want it to look like a Parker, ask for him to do it in the “old style”. Vs. More modern bulino work.
See here a repro 28g that I am doing with him now. “Upgrade” to CHE style.
Maybe it will provide some inspiration for your project.
Note that the bottom and sides were completely wiped out and re done from scratch.
Double setters were by the clients request.
IMG_2844.jpeg
IMG_2845.jpeg