The thing is....

An average engraver's work will reduce the value of an antique rifle like that. It's looked at negatively by the market as a sort of bubba hack job modification.

On the other hand - work by a top name can increase the value substantially - though often not enough to recoup the full cost of the work.

That's where a fellow like Turnbull can add value. His Name carries weight and prestige - and as such his work adds value. There is also a *very* low likelihood of him messing up the rifle and making it unsalable.

If you want to test the waters with a local jeweler or a local engraver/smith - try them out with a pawn shop 1970's+ Winchester 94 or Marlin 336 and see how that goes. This way - if the work goes really well you have something to be proud of but if it doesn't - at least they won't ruin a valuable and rare antique piece.