Hello All: What follows is my dad’s response to yesterday’s post. While it is not about jewelry, it is informative.
In the picture of your mom in the basement at 602 Audubon [Youngstown, Ohio] is a California type case with individual pieces of type called foundry type. They were assembled by hand it what was called a “stick” and picked from the type case one at time.
The two pieces were from Linotype machines and were called “Matrixs” or mats. On the thin side was the mold for the hot lead and the opposite was a visual of the letter for the machine operator. These were assembled and cast into one line of type instead of individual pieces.