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Hi. I have seen similar wear on 1970s Strathearns, so I would not assume it is old just from that, but to me the general style does look pre-1950s. The fluorescence suggest soda-lime glass, and that plus the flat base might mean Murano. However, the glass quality is rather poor, so it may be an early 20th century mid European item. Sorry to be so vague!
Alan