Yes, Clyde gets it! It's Dennis Day under all that old-age makeup, in "Little Old Lucy", an episode of THE LUCY SHOW, originally aired October 23, 1967.
This is a capture from STARS IN THE EYE, a 1952 special marking the opening of CBS' Television City. Lots of strange crossover appearances in this, including Jack visiting the I LOVE LUCY set.
Sorry I couldn't get a better capture. But, it is a MYSTERY photo game!
Sorry Yht, I've got no info on the house. If you watch the show, it's just a painted backdrop behind the stage, though of course it could be modeled on a real house.