David,
Davidson 1964
Marble glass is quite rare; I have only had four examples through my hands, a Jobling No. 2598 Deco random geometric ashtray still showing the Rd. No. 800714 from the mould's days at Sunderland, a 296
Fan vase, a
Chippendale pedestal jug, and a 292 bowl, all, if I remember correctly, marked with one of two sizes of a lion over crown trademark from newly made punches, slightly more angular than the impression from the original C19 trademark punch.
In my opinion the white glass element of
Marble is not as opaque as the white glass used for the C19 slag glass. It could be a white translucent lightshade glass.
It is well worth looking out for. Look for Jobling/Greener flint (non-Pyrex) patterns and all Davidson patterns. Old Victorian moulds could well have been used for
Marble, perhaps still marked with the old original trademark. Distinguishing them could be rather problematic, unless you have one of each side by side for comparison! I am sure that most
Marble is unrecognised.
See
http://www.cloudglass.com for more details and photographs.
Bernard C.