Fairylite Foreign Cup of Knowledge Green Plain
From Mystic Tea Room
Fairylite was a Japanese maker of porcelain for export to Great Britain, and the pieces were marked "foreign," to signify non-English origin. The up of Knowledge made by Fairylight was an illegal knock-off or patent infringement of the original pattern from England. Specifically, this cup is a close copy of the Aynsley Cup of Knowledge Green Plain.
Here's how to tell them apart:
The quality of the transfers of the playing cards is muddier than the English originals, and the colour of the clay body is slightly greyish, untypical of Japanese ware, but unlike British bone china, which is a bright white. Despite the attempt to closely copy a British cup shape, the foot of the Fairylite cup is amusingly Japanese, in a six-petal scallop shape. Some pieces will still bear their original metallic foil paper "Foreign" tags, but most of them have been lost over the years when the cups were washed. Another distinguishing mark of the Fairylite Foreign Plain Green Cup of Knowledge is the mustard-yellow pin-line on the saucer. If it were an Aynsley cup, that pin-line would have been gold.