Antique Alcatraz Island Prison Brass keychain / key tag??

By mxtyree, 16 November, 2017
Description

I found this in a box of my dads. I searched all over google images, ebay and other places and can't seem to find this exact one. Any ideas?

Category
Other
Medium
Brass
Distinguishing marks
Alcatraz island cell no. 4 San Francisco
Date Period
1970's?
For Sale?
Yes
Photos