Unused surplus, screws included they show rust on the treads.
The second one only has 4 screws.
Mid century modern.
Price is for one.
Uniline was made by: Arrow Hart, Bryant, Hubbell, Hegeman, Pass & Seymour P&S and more.
See my other wall plate covers I have many more.
Made in USA
8-1/8 X 4-9/16"

6250-2