Just some thoughts:
) I am not sure that is a Moser piece.
The design of the actual glass and the gilding looks to me to be from an earlier period before Moser started making their own glass:
(Ref Truitt's Bohemian Glass 1880-1940 pp90)
'After several years of refusal, Moser was finally given permission to build his own glass manufacturing facility in Dvory, near Karlovy Vary (my words here - the next paragraph says this opened in 1893). Prior to this point, Moser was forced to purchase it's blanks from various glass houses, most notably Meyr's, near Vimperk, and Harrach at Nový Svět.
2) I think the design of the cutting and type of glass (coloured overlay) reminds me of pieces from the 1850s -1860s.
That flat feathery style gilding (but not the same pattern as yours) can be seen on two pieces of white cut to clear and white cut to red 'Deckelvase' ie. vases with lids, in Das Bohmische Glas Band III pp32. They date to 1850-1855. However, I tend to think of that darker blue on yours as being a bit later c. 1860s but I could be wrong on that.
3) That said, on page 24 of the same book there are two vases in white cut to turquoise blue with large leaf style flat gilding and a similar style of drop motif, so quite similar in gilding 'style' to yours, and which also have the Arabian window type design cut onto them and they date to c.1860-1870 and are said to probably be from ' Adolfhutte bei Winterberg' (book is in German).
m