They got out of the steel handles in the early sixties, so that unit is 50-60 years old. I'd suggest disassembling and cleaning them and oiling them before putting them away. The owner of the 310 shop says he has a 45 gallon drum full of .30/'06 handles, so they aren't rare or especially valuable, but oh-so-high in cool. Fifteen or twenty years from now, when life slows down, you could find them very charming.