08-26-2015, 07:36 PM
This link explains it (and both the 70 and 90 had both metal and Bakelite):
http://www.philcorepairbench.com/cathedralid.htm
http://www.philcorepairbench.com/cathedralid.htm
John KK4ZLF
Lexington, KY
"illegitimis non carborundum"