WM ADAMS OF A CHINESE BIRD PATTERN PORCELAIN PLATE
The registration number 623294 dates from 1913
It is a very old plate, but a reproduction of an even older pattern introduced by William Adams in 1780 being a copy of a Chinese pattern, which  was one of the first of its style produced in English Pottery.  This piece is 1900-1919.
It measures 8 inches in diameter.