Old Bausch & Lomb Spotting Scope Opinion Where Can I Find Information About Old Ray-Ban Wayfarer Bausch & Lomb Style Numbers?

Where can I find information about old Ray-Ban Wayfarer Bausch & Lomb style numbers? - old bausch & lomb spotting scope opinion

I want to buy a couple of walkers online, but I need more information about the type and number decreased, as compared to the styles of today. Pictures would be great. Thank you.