quote from reply No. 5, re Thomas Webb ... " I have a set of six (all marked) of their Sunshine Amber from the Gay Glass range (as per the link)" ............ not quite correct, unfortunately.
The Thomas Webb Gay Glass range included a uranium/yellow coloured version and was called 'Golden Amber' - not 'Sunshine Amber' .............. mind you, with all these Sunshine/Ambers/Sunbeams around, it's not surprising mistakes occur. No idea as to whether Webb or Walsh were first with this u. coloured effect in tumbler - possibly Walsh, but that's a bit of a guess.