Looks very slightly wonky in the pic ...but maybe the angle of photo ?
yes, that's my wonky tripod...
Also the stem is a little fatter than normal but if this is a studio piece then its actually very good.
Making stems is highly specialised. Most modern studio goblets are very amateurish in technical terms.
It's really quite a chunky piece all round. the glass is really thick to the bottom of the bowl, The approx diameter of the outside is around 2.5 ins, the inside is only 1 inch.
It could Murano (which is effectively studio production). However, if by a maestro you would expect better so maybe a trainee. I have a stem by (Murano trained maestro) Franco Toffolo and it is a joy to hold and to behold.
No I don't think it is a maestro's work. It really isn't anywhere near fine enough for that. The way that the opalescent foot has been applied to the milk glass stem is not finely finished, no maestro would have allowed it out like that.