I have seen this particular rim on pieces of glass in a book by Langhamer on Bohemian Glass. Those pieces were described as Svoboda, 1993. So, I'm hoping it's a telltale sign of Czech glasswork (and if it's telltale of Svoboda, even better?) On the other hand, if someone tells me it's German or even Murano, I won't be too surprised either. The previous owner sold it because he got tired of trying to identify it (but then he never asked at this forum, so...)
24 cm high, 6 cm diameter at the base. Polished pontil base. No marks.
Any ideas or observations?