Carse Antiques has dated this piece to the 18th Century.
As far as I am aware these were made in sets of five originally for a card game.

This example is basically pretty good but there is some loss of enamel in places around the fretted part, I have tried to picture every side so you can judge for yourself the extent of loss.
I've had these before but never one as small as this, it is an unusually small example at only 3" by 2 1/2" by 1 1/4" high
CIRCA; 1770 - 1790
Carse Antiques has dated this piece to the 18th Century.
You can view the stock and full dealer information on the Carse Antiques Profile Page
Carse Antiques is a registered member of LAPADA