I couldn't remember the name of this type of 'fern' like engraving - Pteridomania apparently. A recent charity shop acquisition - suppose it could be late C19 or equally early C20 - but whatever probably has some age, and flicking it gives a good ring, though not sure if that's the shape that makes the sound or the possibly inclusion of lead in the glass. About 4.5 inches tall (c. 10.5 cms.).