I looked up the address in Pottstown. Poor Mr. Spacek, he was just the odd man out. There was enough low-end volume telescope business to support Criterion and Edmund but not much more than that. All these companies got started more or less the same way in the post war world. I hope he found other ways to support his family well.
Much likely had to do with available infrastructure. Pottstown is not in the boonies but it's not exactly a suburb either (35 mi from Philadelphia). Edmund was on the doorstep of New York and Criterion was in Hartford, which was a manufacturing center in the first half of the 20th century (Pratt and Whitney, Colt, among others).
Article in Pottstown Mercury
Edited by deSitter, 18 July 2017 - 12:03 PM.