Chippendale Pattern / Shelley China Dessert Set

I know that this is an example of Chippendale Shelley China, however I would like help with the year that it was created. The foot on the tea cup is not green. I have seen other examples where the foot is green. I bought this at a church tag sale.

Lovely Dessert Set of Shelley China

Four Cups and Saucers
Dessert plates
Tray
Cramer Sugar Bowl

On bottom: 10494
Soanne& Smith
Oxford Street
London