Original 1930’s Pontiac horn button. Maybe 1935-36? Decent shape for age. Some minor imperfections. See pictures. Feel free to ask questions. No reserve. 

Measures around 3 inches in diameter.

I am just starting to list a bunch of early automotive accessories from a lifelong collection that started in the 1960’s. Keep an eye on my upcoming auctions. All listings with the green background are no reserve auction and start at $0.99.