I know this is a super old post, but did the Clevengers ever reproduce other versions of the Union Clasp? It seems that they only reprod the ones with the compass. The one I have has an iron pontil. To my knowledge the Clevengers didn’t do iron pontils.
Was at an antique store today and saw a Jenny Lind purple bottle. But I know about the Clevengers and it was one of their repros. The bottle otherwise looked completely legit, even had good wear. I took it up to the owner and showed him the difference between a repro Jenny Lind and the legit ones. It had 200 on it. Hope he relables the bottle and changes the price. But I doubt it. The bottle instead of worth 200 is prob worth about 20...