It's not Sowerby or Davidson. It's not uranium either from those photos.It's blow moulded, not pressed. Looking at the optic ribbing and the rim, I would say 1950s perhaps Continental Europe. It is a vase: the sort usually described as a violet vase from the time when you could actually buy bunches of violets, snowdrops and other small flowers from market stalls. (I remember my father buying me violets as a child.)