I'm not saying at all that this glass is not by Stuart but i have seen a few marked glasses and perfume bottles marked Stuart and they are clearly are not made by Stuart there either pressed glass and some cut glass, the copied mark on the one's i have seen is a dead give away it just does not look like the real thing, i have just charity shopped two i wish i would have kept them to show here, to add to the confusion the wife also informs me that the glasses would often get marked up with the wrong pattern and then cut but these were normally destroyed (or went home in the workers pockets), she also informs me some designs were altered for different markets around the world, (my wife used to mark the glasses up at the Royal Brierley factory), regards chris.