agree, a very attractive glass, though regret I'm clueless as to maker and origin - all you need now are the other five. Take it the decoration isn't machine acid etched?
Is the heat polished pontil scar unusual on these things - I've seen ground/polished depressions and the Y shaped mark where the scissors have cut away the surplus glass. Unfortunately, the last picture is less than clear so can't see the centre of the foot or the pontil.
Lets hope others might have some better info re origin etc.