I've got quite a few of those spacers in with my boxes of type. I assumed they were the same alloy as my type and all my pigs. I had a pig tested and it was closer to monotype with around 74% lead and the rest tin and antimony. The pigs are really hard but work well for blending with softer stuff. Lately I've been doing 1# of this mono to 4#s of ww alloy. Seems to cast well.
Bb
