These two appear to be Xbuckli, the true Christmas Cactus.

I don‘t know anything about holiday cactus, but this is the true Christmas cactus Schlumbergera x buckleyi . You can’t find it in stores. Doesn’t surprise me you found it at an estate sale, it’s probably pretty old. People have passed down this type of cactus for generations. Take good care of it. They’re jungle type cacti from Brazil. So don’t treat like a cactus from an arid environment. I’ve never grown holiday cactus, but many on here do and will give you good advice. Here’s a little info;).

Thank you! Its definitely OLD! this is 1 of 4 i got. They are MASSIVE! They ill definitely be well cared for :-) thank you so much for your help!