I have tons of cool kitchen tools from my grandmother and mother. This little device came from my grandmother who, by the way, was an unreal cook. I’ve been trying to duplicate her eastern Tennessee apple sauce for years. I have come close, but no cigar so far. When I was a kid, I would make myself sick eating it.
Anyway, I had no idea what this tool was, even though it is actually pretty obvious once you
know what it is. You place a hard-boiled egg in the “scoop” part and press the wires over it for perfect slices. The wires aren’t strong enough to slice anything much harder than a hard-boiled egg and this one is still operating perfectly after all these years. I suppose you might be able to slice some other soft items, such as dough, but I use it every time I make salad with hard-bolied eggs. It is so simple and perfect, no mess as with with knife slicing and yolks disintegrating (even a really sharp knife).
It looks like it is made out of some kind of aluminum, as it is very light. There is a locking mechanism that keeps it closed in a drawer. Simple and not a tool I’d expect to have been common years ago. But, cooks back then still liked to do things neatly and quickly.