The picture shows a view of this Old Celluloid Pioneer Engineering Corporation AdvertisingEmployeeBadge. The history of this company is unknown. The year the pinback badge was made is also unknown but it is old. There is black print on an off white background. It is marked as follows:
PIONEER ENGINEERING CORP. 520
The pin measures 1-3/4'' wide and is in fair condition with cracksand scratches as pictured.