Hi,
The importer was Thomas Glaser, he entered marks at the London Assay in 1885 and 1886.
Glaser appears to be an interesting character. It is likely that he was just a traveling agent for German firms, his addresses supplied to the London Assay Office turned out to be the postal addresses only for London hotels, and thus they cancelled his marks around 1894.
As agphile has suggested, this piece has its origin in Hanau, but the user of these marks is yet to be determined.
http://www.925-1000.com/Fgerman_hanau_marks_01.htmlTrev.