Clear pressed glass tazza or cake stand with what appears to be raised RD 735621 to base.
Can't find it in
http://www.great-glass.co.uk/glass%20notes/regnos08.htmRD number should have been registered sometime in February 1928. Is the registrant in the Blue Book, please?
It would appear that the Blue Book is now out of print . Does anyone have a spare copy for sale, please?