I have several rubber? (or possibly ceramic?) disks which came from a privy or
trash dump next to a Los Angeles school cafeteria (ca. 1890s-1910s+). Has
anyone ever seen anything like them before? Six of them have "M & M"
stamped on both sides and one has "HQ" stamped on both sides. They
measure 1-1/2 inches in diameter and are 1/8 inch thick. I would appreciate
any help. My internet research has proved futile. Photos can be viewed at the
link below.
http://www.flickr.com/photos/10925368@N07/