that was probably my fault m for encouraging Chris to add an unrelated item here;) Chris - as a suggestion, why not start a new thread in the next day or two, called - 'Additives affecting the colour of glass' or some such........

P.S. you don't get id's for sweetmeats m - you may argue over age/date or style, but never id

I wanted to see this piece so my fault.
Assume you're taking the bowl pattern and raised foot, from the left hand example Chris, to compare with yours. In the Tim Udall collection there were pieces virtually identical to yours and the Delomosne description reads............ "Panel moulding, sometimes called rib-moulding, seems to be the most favoured treatment of vessel glass, certainly in the middle fifty years of the C18, the period in which all of these five glasses fall" - (there's a b. & w. plate showing five jellies/custards accompanying this text, both with and without handles. It would be difficult to say definitely 1730 as these things are impossible to date with precision.