This 8in Plate was produced in 1966 just as the Poole Studio range turned into the Delphis range. When the change occurred there was a six month period where the backs of plates were glazed in the Magnolia glaze which turned the backstamp blue. When the glaze changed to crystal at the end of 1966, the backstamp remained black.

Anyway, the signature on this plate is hard to decipher but is either Geraldine O'Meara or Shirley Campbell. It's difficult to take a good photo of the plate as even with the flash off, there is a very high level of reflection. However, it's a good geometric design and there is no damage.