What's my Aynsley China tea cup & saucer worth?
I have an Aynsley England china "The Cup of Knowledge" tea cup and saucer. The mark on the underside is of the crown with "Aynsley" written above and "England" written below. This link suggests to me that this mark is from 1905-1925. This is the link (scroll down):
However, both cup and saucer are also marked in red ink a code: 4914F
As well as these markings, the cup has a black printed number "No 702537" written on its underside which looks like this (look at the final image - note that the green marking is different in this image):
Any ideas what these marks could mean, and how much the cup and saucer could be worth?