Could be off a Marmon car. Maybe the grille badge. They made cars from 1902 untill the early
thirties. Suberb cars.....16 cyclinder engines
Would not be common to find one.
The Marque has an interesting history - The Model 32 of 1909 spawned the Wasp, winner of the first Indianapolis 500 motor race. This car featured the world's first rear-view mirror. http://en.wikipedia.org/wiki/Marmon_Motor_Car_Company