By this time, of course, the lion and crown badge was in use so there need be no confusion.
The RA-numbering was continued for several years after Allen had retired.
However, the exact date of introduction is not known.
Many dated examples between 19 exist, and occasional examples dated between 19 have also been noted although B.8 was more generally used in those years (with the words MADE IN ENGLAND at the bottom of the mark in place of the single word ENGLAND).
1886 to mark the appointment of Henry Doulton as 'Potter to H. A simplified version showing only the coronet on a flat base and the word DOULTON was also used.
The coronet was probably added to the earlier mark c. The Prince of Wales' (later King Edward VI 1), ENGLAND was added underneath after 1891. It appears to have been used instead of B.3 especially on bone china products and on the more expensive earthen wares.
Between 1878 (when Henry and James Doulton acquired the major interest in the Pinder, Bourne factory in Nile Street, Burslem) and 1882 (when the name of the firm was changed to Doulton & Company, Burslem) existing Pinder, Bourne marks continued in use, such as the name in full: PINDER BOURNE CO.: and the initials P. Introduced in the latter part of 1901 to mark the grant of the Royal Warrant by King Edward VII together with the specific right to use the word ROYAL to designate Doulton products.This mark is still used on fine earthenware products such as Character Jugs.This is the same as 13.9 except for the addition of the words BONE CHINA.It must be kept in mind that some patterns remained in production and usually kept the same number for many years.The trade-marks were, however, changed several times between the 1880s and now, and these can help to establish the period of production.