Doulton marks dating
defined collecting as a “gathering together or picking up,” suggesting, perhaps, that the lexicographer had garbage in mind.
Very early examples from 1934-37 may just have the royal doulton stamp on its own with a small number next to it, or just the word "bunnykins" below it.
Since 1935 Royal Copenhagen have added a small line in the trademark on almost every single piece of porcelain.
This small line indicates which year the item has been produced.
The trademark with the three waves has had changes through the years.
This makes it possible to tell the age of each piece of porcelain by Royal Copenhagen.