Brent, your Mr. Jones is likely the Jones whose sign in pictured next to Lewis in previous text. Greener was their neighbor. I'll have to dig out my Greener file. As I recall the factory letter on my Monarch Imperial listed several engravers and other finishers who worked on the gun.
A bit later I looked at my factory letter and see---
Smoother-Watson
Polisher-Jones [paid 12 shillings]
Action filer-Camm [paid 50 shillings]
Name engraver - Stokes [paid 4 shillings]
Game and scroll engraving-Perry [paid 50 shillings]
Barrel blacker-Fletcher
There are six other workers listed for the gun, also

It took 20 shillings to make a pound.
This work was done in 1900.

Here is what Camm, Stokes , and Perry worked on. Mr. Jones, the polisher, would have had a relatively tough job on this one.
[Linked Image from i.imgur.com]