DesertGold/Moorcroft: https://www.desertgold.us/moorcroft/Moorcroft.html
HIBISCUS (Walter Moorcroft) Stoke-On-Trent, England Cobalt Blue Bowl Approximate Dimensions: 7.25" (18.415 cm) Diameter 1.25" (3.175 cm) Height Circa: 1953-1978 "Potters to the Late Queen Mary" Paper Label Painted "WM" initials of Walter Moorcroft