DesertGold/Moorcroft: https://www.desertgold.us/moorcroft/Moorcroft.html
CLEMATIS {Designed by William Moorcroft and continued by Walter Moorcroft} Cobalt Blue Mini Bowl Approximate Dimensions: 3.625" (9.2075 cm) diameter 1.5" (3.81 cm) high 1.5" (3.81 cm) footed base diameter Circa: 1939-1975
Roughness on Rim