A painted enamel on copper plaque

Of rectangular convex form, depicting a cavalier standing at the bottom of a staircase, signed to the lower right corner 'TS', in a gilt-wood frame with a velvet mount
The plaque, 22cm x 12cm approximately

Condition report:
- Fine craquelure to the enamel throughout 
- Two blue specks one on his cheek and one above the hat appear to be manufacturing flaws
- Small shallow indentation to the boot
- Securely mounted in the frame
- Two small glued breaks to the gilt gesso frame
- Generally nice overall