Frank — Thanks. It depends what you mean by cast. It must have been moulded with the front uppermost, to stop the glass falling out of the stand. The back surface is flat, as you would expect from a metal mould. The front is recessed about 2mm with a moulded relief border around the edge, but within the border the surface undulates slightly as though it was a natural, cast surface, quite different in character to the back. So, Frank, if it was cast, how did they stop the molten glass falling out of the front 2mm of the bordering frame? Skyhooks?
Bernard C.

ps — for those who can't remember, skyhooks are what hold up anything with no visible means of support, like birds, butterflies, aeroplanes, the moon, stars, and great-aunt Edith's hairstyle. Ask any child.
