I think this might be Brierley, i have sold one the same shape signed different colour but larger, i can not find any other pink ones but i have seen another shape a pair boxed same colour, can't remember if they were cased, what do you think?. The antique shop in Lye has a piece i think is Brierley studio, well worth a look if your a collector, it's a beauty and only 25 quid, a flared pink swirled bowl
5 inches in height and 4 inches at the widest diameter.