I found this great PDF detailing the various vintage "Monitor" series from Polk Audio. I find it very helpful as I try to sift through the various names and renaming Polk did for these speakers. I'm not sure who to give credit to for creating it, but I wanted to post it here for others to enjoy and also to send a big thank you out into the void for the author. If you happen to know who s/he is, let me know and I'll give them an attribution in this post.
(Broken into 2 PDFs to meet upload file size limit.)
(Broken into 2 PDFs to meet upload file size limit.)