Mytton Antiques - Jerrard Nares has dated this piece to the 18th Century.
The mug with a scroll handle decorated with dash work, and joining the body amongst petal decoration.

The main body of the mug painted with an armouring cartouche, set within scrolling and spreading leaves, and topped by a cherub. The underside with makers mark.
Height: 5", 13cm.
Width: 4 2/4", 12cm.
Depth: 4", 10cm.
c.1790
Ref: 21592.
Price: £150
Mytton Antiques - Jerrard Nares has dated this piece to the 18th Century.
Fine antiques from the 18th century onwards, supplying both trade and private customers worldwide.
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