Pin-back button

Title:
Pin-back button
Medium: 
Plastic and metal
Dimensions: 
Overall: 3/4 in. (1.9 cm)
Description: 
California button with allegorical female figure Eureka, penciled out back, illegable inv. number written on front in red marker
Credit Line: 
Unknown
Object Number: 
Z.3621
Due to ongoing research, information about this object is subject to change.
Creative: Tronvig Group