[piecesparts]

I have seen boxes like that. It has been quite a few years. The items that you have in your hand appear to be fencing items that hold wire to a steel post. the vee goes up against the post and the hooked ends are wrapped around the wire, on each side of the post. Did a lot of that in my youth. My recollection of the metal parts in the lids was that they were spring loaded, but maybe not. It does appear that the lid does have an angle iron for the support to sit against, while the lid is open.