Baker Bros. (Ltd) 
of the Meir Works, Longton, Stoke-on-Trent

period of operation = c.1876 - to after 1960...

"LTD" occurs on many marks (but not all) from 1901 onwards.

"MEIR WORKS", "MEIR CHINA", "MEIR WARE" generally occurs after 1912 but before 19307 (but not always).

"TUDOR WARE" occurs after 1937.

Mark

Description & date

B.B.

impressed initials used c.1876 - c.1900

[but note that this mark appears in a 1960 trade directory]

this mark is c.1921 and onwards because of the addition of "MADE IN ENGLAND" as required by the McKinley Tariff Act of 1890 (amended 1921)

Not the introduction of "Tudor Ware" after 1930.

The marks shown usually appear separately. 

printed mark c.1930+

[but note that this mark appears in a 1960 trade directory]

printed mark c.1930+

printed mark c.1950's

printed mark c.1960's