Hi Christine - it's modern Fenton, of course, but the pattern is the old Imperial "Heavy Grape" one. Fenton call it a "Grape Cluster" nappy. I don't know when Fenton made the colour that that you have, but if the Fenton trademark/logo on the base has a number in it, then that will give you the decade. The mould was certainly in use in the 1970s in Carnival.
Glen