History: Traffic officer, Washington, D.C. complete with mirror to see behind him. 1920. [1514x2089]

https://i.redd.it/jr2sih34pui11.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/9azrwk/traffic_officer_washington_dc_complete_with/?utm_source=ifttt