There is one in clear glass running now - 320195742542
This one has the victorian lozenge mark identifying year of make.
Then there are a couple of non-marked amber ones here - 370001317035
A green unmarked one here - 190182286972
And there are the Summit Glass ones which are similar in shape but with a carnival finish.
Are these common?
They seem to pop up quite often in my paperweight searches, and I'm usually tempted to bid