The Thor Tenna would be a guess....there are so many just now it would definitely be a guess. Here are some pics of my Thor Tenna that may help. The one you have was an older plant...now I have some younger ones.
I honestly don't know but there is a page on facebook called Holiday Cactus Lovers that you could post it there and see what they think. They do a lot of IDing for people.....not sure how accurate it is, but they are really sweet and helpful.
https://www.facebook.com/group...
Sorry I can't help you more.
