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engineeringhistory: “ Detroit one-way police radio, 1928 ” Note to self: find out who in the family is hiding all that sweet one-way radio battery money.

engineeringhistory:

Detroit one-way police radio, 1928

Note to self: find out who in the family is hiding all that sweet one-way radio battery money.

High-res Notes: 71 7/11/14 — 3:32pm Short URL: https://tmblr.co/Z9Ewzt1LCUFhI
 
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    Note to self: find out who in the family is hiding all that sweet one-way radio battery money.
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