I have a epns teapot. I’m struggling to know where “Uperior” originated from. Mark appears to be a bridge with uperior written in the arch of the bridge. Any information would be appreciated. Image attached of trademark 
As nobody responded to your previous query 18 days ago I don’t think you will get a response this time. I did have a look through my usual sources for electroplate marks but couldn’t find anything.
Phil
The word looks like “Superior” to me
Not my photo 
found on the net
