Welcome to the board.
It looks like your vase is signed Kosta O?976, Kosta is easy enough - a well known Swedish glassmaker. The rest of the code is a little harder, it may be a design by Edvin Ollers from the early 1930s (but it could have been made later).
Kosta did not merge with Boda (and Afors) until the 1970s.
John