In case this hasn't already been brought up, in the episode "Viv Visits Lucy," there are two recognizable props from "I Love Lucy," and "My Favorite Martian," (MFM was originally shot at the Desilu Culver Studios.)

They can be spotted in the scene that takes place at the Hairy Ape. As they speak to the man at the door, you can see the female cow head that Lucy wore in the matador routine in the "I Love Lucy" episode "Bullfight Dance." It can be seen in the lower right hand corner of the scene. And if you look over Lucy's right shoulder, you'll see a green space creature that was used in the "My Favorite Martian" episode "There's No Cure For The Common Martian."

I think I remember a prop in a later The Lucy Show episode. It was one of the puplic domain episodes I remember watching. I can't remember which episode it was in I'll have to watch them again. Anyway in Lucy's California apartment in one episode there are two chairs that looks like one of the old chairs that was in the Ricardo living room in Season 1 of ILL before they got new furniture. I bet the reused some funiture from the I Love Lucy set for The Lucy Show set.