Stick pin of the Pontiac cars logo, such as used prior to World War II.
 
The shape of the Pontiac sign evolved quite a bit over the years. Only the pre 1950 varieties showed a variety of Chief Pontiac images. Later solely the downwards pointing arrow remained.
 
The round part has a 16mms section. The pin is 45mms high, all told.
 
Just one copy!