A rectangular screen set appears at 6:37. Shemp loses his ring in it and starts tearing its stand-in apart, eventually pulling out a round CRT that has a blow pattern, which Moe brandishes like a club. It's understandable why they wouldn't have destroyed a new set for this bit, but I can't tell if the first one is even real. For all I know it could be the same set mocked up to look newer.
https://www.youtube.com/watch?v=wXR3-TTN6_8