My experience with Murano glass is that almost none is engraved with a makers name and certainly not with a date. So I believe you have two possibilities heere. Firstly, it is the product of a small studio and the techmiquwes are not to difficult for that to be true. Secondly it is a frigger made in Murano by a glassblower and then later signed and sold by the worker. Personally I am tending to the second possibility.
Ross