Doesn't look much like a Luger to me! From an old pasteboard box for an Esico soldering iron. Below, more stuff from the box:
The Electric Soldering Iron Company had its beginnings in 1928. It's still around, now as Esico-Triton International, and still headquartered in Deep River, Connecticut. There are not many American tool firms left that can boast such longevity and loyalty to one location.