Early automobile winged brass radiator cap. Maybe 1920’s Chrysler. Not completely sure. Nice shape for age. Some minor imperfections. See pictures. Feel free to ask questions. No reserve. 

Measures around 5-1/8 inches from wing tip to wing tip. Inside diameter of threads is right around 1-5/8 inches.

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