So far I've established that the base was made by Berliner Electroplating in the 1920's.
I'm assuming that Alderton and Co. England made the glass top.
Q1 Would you say the top is Carnival glass, or encased glass.
Q2 Google as much as I like I cannot find anything about Alderton's - would anyone be able to shed any light on who, when and where.
TIA for any help you can provide.