Here's the Hayward Brothers pavement light I just received (from Canada!), it's lens No. 22:
As usual, it's photographed upside-down. The flat side is on top, to be trod upon. They usually appear on sales tables in this orientation, which is the way they sit best. Usually sold as paperweights, as this was.
It appears to be a variation on their first design, Patent 1871/2014
, and is quite different than Bernard's
And this is the St. Pancras light (traded here in the US):
Keep an eye out for these things & send them to me