The Doulton tableware marks are below the glaze (as is the decoration in most cases).
It could thus have been applied at any time between the first, biscuit, firing of the ware and the final step of application of the glaze.
It was in use for all Fine Bone China products between 19 and is still used today on figures, animal models and other non-tableware Bone China products. piece with B.7 for example, will have been made before 1927 and probably before 1922.Various special marks will be found on figures, Character Jugs, animal models, Series Wares, Titanian, Morrisian, Flamb? These, by themselves, are not of much help for the purpose of dating but fortunately they are usually in addition to the standard trade-mark in use at the time, e.g. Pattern numbers, Registration numbers and artists' signatures can also help to indicate the period of production. 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.The new mark and use of the name ‘Royal Doulton’ as opposed to ‘Doulton’ signify the grant of a Royal Warrant to Henry Doulton by King Edward VII in 1901.
From 1922 or 1923 until the end ( presumably) of 1927 tableware appears bearing a mark that lacks the traditional crown.
Several of these were adopted after 1882 by Doulton and remained in use for about twenty years. Occasionally found also between 19 along with B.7 but the later Holbein Wares were not always specifically marked.
Other devices occur incorporating the name of the pattern. This mark, adapted from a similar Lambeth mark incorporating a device of four interlocking D's was introduced c. An adaptation of B.4 used on the Holbein Wares mainly between 18.
Virtually all Doulton tableware has a black printed Doulton ‘mark’ or ‘backstamp’ applied to the underside of the piece.
The mark was varied from time to time and the table below includes the major marks that appear on tableware manufactured at the Doulton (Burslem) factory (Series Ware and the Lambeth Stonewares often have special marks).
This mark which differs from B.7 by the omission of the crown was in use between 19. The bottom part only of this mark is found on smaller wares up to the present day and by itself is not a useful indication of date.