Hello !!
It was not uncommon for soldiers to etch/engrave their names on grips & holsters of issued and/or captured equipement...( I have a P38 holster displaying a cute little Donald Duck on the flap...Navy/Marine capture Rig ?? )
As John pointed out it doesnt add value...
Erfurt production in 1917 was 150 000 pistols...
Photos are always nice....
MARK