This is a recent find and having picked up a few new modern bits thinking they have some age i found this yesterday, it has no wear and is very light (357 grams). I have looked at a few of these and they all seem to be over 1kg, but there is a 10 inch version weighing 456 grams, i'm wondering if they are being copied or if this is an original that has fallen short glass wise whilst being made?.
It's 10 1/8th inches in height, 3 1/2 inches across the base and the rim is 2 7/8th inches across.
Regards Chris.