What are they rug protectors in a brass box?

By irakozak1, 2 December, 2022
Description

Hi I picked this up about 35-40 years ago, I never opened it because I didn’t want to damage it. 
some things in life are better to leave as a mystery. 
I believe it contains coasters or rug protectors? 

any information would be appreciated and helpful please and thank you!

Category
American Furniture
Medium
It is a heavy brass “tin” approx 3” in diameter weighing about 1/2 pound
Distinguishing marks
Engraved on the back Colonial Chair Company Chicago

With an Engraved chair on the front and where the cushions would be it was hand painted in red.

It is a bead rolled seal around the can I didn’t want to damage it and have left it in original condition.
Condition
Excellent
Size and dimensions of this item
3-1/2” diameter 9/16” thick
Date Period
Late 1800’s to early 1900’s
Weight
8-10oz
History
It has been In my possession for 35-40 years on a shelf.
Price Paid (If known)
Don’t remember
For Sale?
Yes
Photos