Prison Made (Not the Zephyr) - Helena, Montana

The 1948 Lincoln Zephyr's detailed trunk latch is pretty sweet - but just as intriguing is the vintage Prison Made license plate.
Montana issued its first “Prison Made” vehicle license plate in 1928, pulling production from costly out of state makers. 
Check out Sean R. Heavey's colourful plate sampling here in his post from February 3, 2017. 
Even though the “Prison Made” stamp was only a feature from 1939 to 1957, Montana Correctional Enterprises at Deere Lodge state prison continues to manufacture the ever-expanding variety of Montana license plates - and a host of other products that you can view here.