I see nothing wrong with the marks, I really think you are giving misinformation *** what are your qualifications for calling this a fake? it is not uncommon that an assay mark be marked separately from the makers an purity mark... the 88 and makers mark are unpside down or the assay mark is, there is nothing spurious about this, this is a Plique a jour item such as seen here -- a little less enamel but all the same inside with gold vermil

marks are worn as stated from the silvercollection.it
"My advice is to look for how fresh the hallmarks are, they should be quite worn from over 100 years of wear. If you see clear impressions of those marks, that may mean they are modern reproductions.
Anyway, for objects and hallmarks illustrated on this page I use the definition 'of dubious origin' as a result of personal evaluations and knowledges of a small collector and NOT as an expert's opinion."