The picture shows a view of both sides of this Early Goodyear Novelty Rubber Company Advertising ClothingButton. This button appears to be made of a hard rubber. The year it was made is unknown but it is old. It is marked on the back as follows:
NOVELTY RUBBER CO. GOODYEARS PATENT. 1851.
This vintage clothingbutton measures about 1-1/4'' wide. It could use a cleaning but it is in excellent condition as pictured.