Since I'm the "a-hole with no class" I'll repeat what Stan said and reiterate that Google brings up numerous references in Guns magazine from the mid 1960's that describe Mr. Derbes as an importer and distributor of arms and ammunition in eastern Pennsylvania.
One ad/article stated: "Caliber .22 Tracers
Sometimes it is nice to know where your
bullets hit even when conditions are such
as to make this difficult. We have tested the
imported Gevelot .22- Tracers and find that
they do the job very well without danger
of fire. Matter of fact, we used the test
suggested by George 30-06 Derbes, Dept. G,
Pottsville, Pa. George suggests that you fill
a cardboard box with excelsior and fire a
few rounds into it. Fire danger: Nil. If your
local gunshop does not carry it, write to
George and he will forward your order to
the nearest dealer. Ammo, by the way, is
standard .22 Long Rifle fodder and will
chamber in all guns designed for .22LR."
If you were trying to determine if he was the owner of said Italian guns, I would wager that was probably not the case. More than likely that was the scroll he placed on the guns he imported. However, that is just a guess based on the fact that he was a distributor and that he put his location after his name like most/all import stamps.
My apologies for derailing your post.
