3 Vintage Skeleton Key Doorknob Back Plates & 4 Skeleton Key Plates

Description

2 back plates are ornate but have scratches, they seem to be brass. 1 back plate is oval and appears to be metal with copper plating. All of the small key plates appear to be brass, the oval one doesn’t lay flat, it’s domed and seems like brass plated.
Please refer to the pictures for overall condition