Touch of Time Antiques has dated this Rockingham Porcelain Coffee Cup to the Georgian era.
The front panel is finely painted with a study of seashells and marine foliage, set within a gilt rectangular reserve.

This form and decoration are typical of Rockingham’s finest tea and coffee wares of the red griffin period, with rich ground colours, high-quality painting and elaborate gilding.
The cup bears the Yates, Leeds mark.

Dimensions
Cup: 7.5 cm high, 7.7 cm diameter
Saucer: 15 cm diameter
Condition
Excellent antique condition. No damage, no restoration and no glaze crazing. Only a couple of superficial scratches consistent with age. A very decorative and collectable example.
Touch of Time Antiques has dated this Rockingham Porcelain Coffee Cup to the Georgian era.
You can view the stock and full dealer information on the Touch of Time Antiques Profile Page