Antique English cup & saucer earthenware transfer diamond mark orig 1870s [60]

Antique English cup and saucer earthenware transfer diamond mark for the 1870s, excellent condition for its age, surface scratches, there is a stain inside, it does not show as a hairline, I may be wrong, rough base borders, defects in the transfer from the manufacturer, the cup is 2 1/2" tall by 3 1/3" diam and saucer is 5 3/4"