Here's Bela Lugosi as the Monster, presumably from Frankenstein Meets the Wolf Man. As I said before, in the previous entry, "Ghost of Frankenstein," in which Lon Chaney, Jr. played the Monster, Ygor (played by Lugosi) had his brain transplanted into the Monster (at first he was happy about being in the new, more powerful form, but then he quickly went blind... something that was apparently ignored in Frankenstein Meets the Wolf Man as well as the House Of... and Abbott and Costello Meet... entries).
This kind of ended up making sense with Lugosi playing the Monster here (I think Glenn Strange played the monster in the latter three movies, although I could be mistaken about one of them). Karloff had enough of playing the Monster (I don't recall off the top of my head if he was the Monster in Son Of... or not... but the IMDB lists him as the Monster in Son, so there you go!).
By the way... in case you don't read the comments, the other day's post had a comment from the creator of a new Monster-themed blog, Monster Sightings, Susan Tyler Hitchcock, which is sort of a tie-in with a book she's written that is coming out soon, Frankenstein: A Cultural History, which I hope to latch onto a copy of (hey Susan, in case you're reading this post, if you want to throw a copy my way for review purposes, I'd be happy to plug it again when it comes out!).
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