I'm not an expert, but it can be dated before 1976, when Kosta became Kosta Boda. However, it does look late 1950s-1960s to me. There is some data on the various code numbers, so hopefully this little bump will help.
Valuations are rarely given here, for a variety of reasons - subjectivity, fluctuations in the market, etc. But good glass will always find its mark through auction or online sites.