having some trouble finding anything that relates serial number to year on these.
I have 2 of them.
One is white glass 64" 37#
The other is 62# 45X# serial AB-3756 Dark Brown Glass, Has a arrow with ben pearson through it and Cougar 7050.
If you google ben pearson history. U can click on ben pearson page and then hit old catalogs. They go back to like 1959. Might help with year.