DesertGold/Moorcroft: https://www.desertgold.us/moorcroft/Moorcroft.html
Moorcroft Pottery HIBISCUS (Walter Moorcroft) Cobalt Blue (sans lid?) Bowl Approximate Dimensions: 4.25" (10.795 cm) diameter 2" (5.08 cm) high Circa: 1953-1978 Stoke-On-Trent, England