Pin-back button

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