Is it stamped "Ideal" or "Lyman"?

by Glen, Monday, May 27, 2013, 09:26 (4143 days ago) @ anachronism
edited by Glen, Monday, May 27, 2013, 09:35

For un-vented mould blocks, I'm going to assume that it was stamped "Ideal". Your mould probably dates to the 1930s.

The HB plug could be an after-market modification. I've seen that done before (after the original HB plug presumably got lost).

http://www.lasc.us/Fryxell_Book_Appendix_A_MouldAge.htm