This 19th century small platter or side dish in modern terms is from Grimwades Stoke on Trent and is the ever popular Carro pattern (compatible with Meissen onion pattern). This blue on white is a timeless dinnerware decoration and has been used by many china companies.
The plate is 5.5 x 9 inches and is in the shape of a traditional meat platter. It is the perfect size for relishes or side vegetables for a small dinner.
The plate is in superior condition for one so old. It has no chips, cracks or design deterioration. It does have some crazing if you look with a magnification glass.
The back stamp is green with a rather circular logo Grimwades Stoke on Trent with Carro (pattern name) above it and Trade on one side and Mark on the other. I cannot tell what the shape in the center of the logo is but it predates the globe used later in Grimwade pottery.
According to my research this plate was made between 1862, when the word trademark was added to back stamps, and 1891 when it became a requirement to add England.