Doric China Co was a very short-lived firm, operated from the dates of 1924 to 1935 .

 They used the Crown with M on the mark  of plates shown above from 1926 - 1935. 

Doric China was ware manufacturer in Fenton (c.1924-6) and then at the Clarence Works, Longton (c.1926-48)

The proposed Indian Trees hand paited plate 17 cm (6 ¾ inch) in excellent antique condition