vintage hand blown glass wine bottle or decanter, Blenko 646? olive green colored glass

Vintage hand blown glass decanter in a olive green color - I was told this is a Blenko bottle, but the stopper just doesn't look like Blenko to me. And I's pretty sure this stopper is original to this bottle. I'd guess this is probably later 20th century European glass, maybe Italy? maybe Spain? maybe eastern Europe? No marks or labels, so I just can't say for certain.

I loved the warm golden green color of this piece, and the hefty weight. It's probably intended as a wine or liquor decanter - but I think this would make a perfect bottle for olive oil! It's about 10" tall for the bottle, 12 1/2" tall with the stopper in place. Condition is very good, no chips or cracks, no clouding.