What a find! An extremely well printed 18th C example of Worcester's "Fisherman and Cormorant" or "Pleasure Boat" pattern in a coffee cup which still rings!
You may have seen examples of this pattern in reference books. They are usually darkly and messily printed. This cup is printed so clearly you can see every small detail.
It is 2-1/2" high.
The porcelain cup's only flaw is a tiny shallow flake (or perhaps it was a glaze bubble) which was "touched up" at some point. I show a close up of it in the last photo.
The cup is marked with one of the Worcester "disguised numerals" on the base. It dates c. 1770.
For a good photo and description of this pattern and the mark, see page 427 of Godden's "British Porcelain", where he compares this Worcester pattern with the similar Caughley pattern.
Please also see the other 18th C Worcester & Caughley porcelains I currently have for sale.