I've seen that rim design before, but can't remember the make or if it may have been a no-name.
From what I can tell, that rim is all metal (the buldges beteen the hooks line up with what appear to be indentations on the interior), so I doubt if it would sound like a spunover rim. The only way to find out what it would sound like for clawhammer would be to make a 5 string neck for it.
I do not know who made your all metal pot tenor banjo. But, I once owned a Luxor brand tenor banjo marketed by B. Horenstein & Sons, New York City. My Luxor is somewhat similar to your unbranded tenor (attached). The attached 1920's all metal pot Luxor is the only one of that type I've ever seen until yours. I had mine purely as a collector's item as an example of Jobber, Horenstein's wares so I don't know how it sounded.