Hi,Ive been wanting to help on here for quite a while and now I am happy to have a go.The vase is Sowerby 1933 "Iris" it comes in two sizes and has a black plinth with flower holder (not a frog with holes in the top)It is in the Sowerby gateshead book by Simon Cottle.Made in Flint,Amber,Green,Rosalin and powder blue.P.S I am lucky enough to own one myself!Happy to help.Kay.