A friend gave these to me recently, about 25 pounds worth. They are thin lead strips, a couple feet long and several thicknesses. Most are maybe 1/16" thick.
I don't know what they are, but they're definitely lead alloy of some kind, and a lot harder than pure. I put a small piece on top of the pot and it melts at around the same temp as the ww alloy in the pot. When I melted a little in a ladle, it sure looked a lot like linotype.
Anyone seen thin lead strips like this before?