Before 1904, pieces of Wild's bone china were printed or impressed on the back with a simple crown mark with the letters "T. Soon it had offices in Australia, Canada, and the United States.
Willing to experiment with the latest in industrial technologies, the company was an early adopter of kilns fueled by gas and electricity.
As a self-confessed china geek, one of the first things I do when I pick up a teacup is turn it over to look underneath.
I do this mainly when out shopping, but I have been known to sneak a quick peek on the underside of a teacup when drinking tea at a cafe, hoping that no-one spots me and wonders what on earth I’m doing!
If you want to do a quick search, press CTRL on your keyboard, followed by "F".
The hallmark establishes the company who made the china and sometimes even the year that the china was produced.
Some pottery companies changed the hallmark slightly with each new product line or included pattern names, country of origin, artist's initials or other identifiers that can help you identify the manufacturer.
Robert Allen and artists in his studio were often allocated RA-numbers for their hand-painted wares designed and decorated by them.
The RA numbers are mostly hand-written and accompany the standard Doulton marks.
Robert Allen handpainted wares were never produced in large quantities and many were never repeated.