Is that a delgrego/rungue upgrade James?

I believe that are both DR upgrades.

Here is what to look for.
Bob Jurewicz

I’ve seen that on a few of them Bob.





.

One owned by a better known dealer said "ENGRAVED BY RP RUNGE ILION NY
Another he had, had no hidden signature.

Im pretty sure I see it on the 28

Every D/R A-1 upgrade I have seen has been in the same engraving pattern with the same sort of embellishments and frame sculpting.