Pinchbeck Cameos

by Toni Hornbaker
(Grand Rapids, Michigan, United States )

My Mothere in law willed me her beautiful collection of Cameos. I plan on adding to this collection. I have 2 shell cameos that are Pinchbecks that I am unable to find any marking on. I am somewhat confused by this, do these have any value ? I do not plan on selling any of these beauties. I also have one that the back is fully enclosed that I have not been able to find anything out about it. I didn't think this was something that was done?