I like it - the pressed pattern is attractive - assume you mean sugar basin and presumably the No. appears on the glass. Guggenheim appear similar to Jules Lang (based in U.K.), who were also importers from the Continent, though believe they did make a few bottles, in the U.K. possibly. Presumably Guggenheim must have applied for the BoT Rd. No., then sent details to the factory, but guess we shall never know the name of the maker.
Lang appear to have been prolific with U.K. BoT Registrations around this time - I have pix of several of their designs which I intend to post on the Board, and which again we assume were imported from outside the U.K. Just had a quick look in the Blue Book, but seems 494747 may have been a one off.
Impressed with quality of the photo - looks very good - clear glass not easy to do justice to.