Inside Painted Snuff Bottle

I admired a set of these bottles very much when I saw them at a client's home. Years later, the client gave them to me as a gift. Needless to say, I was very honored. However, as much as I like them, I can not figure out how to identify the artist or period. Any help would be greatly appreciated.

This bottle is the smallest of the the three that I have. It appears to have a scene of a young man on one side and the same man (and tree) at a much older age on the older side. It has a small little bone spoon attached to the cork on the inside. It is about 2.5 inches tall.

Any help is greatly appreciated!! :)