Speedometer I've never come across before, a windspeed indicator mounted to the hood trim on a 40's Chevrolet

I bet it works as a bug deflector like the green one I photographed as well as a speedometer

Great advertising photo of the optional record player in a 1950's car

Via: http://thisisnthappiness.com/

the running horses optional Mustang interior

Visual ID of 1948 Chevrolet optional accessories listed alphabeticaly

Above: 1947 Chev Fleetline hood ornament, Below: 1948

http://www.1948chevy.com/support/accy1.htm