History: A knocker-up, before the alarm clocks, wakes factory workers every morning in Lancashire. c. 1900 [1024 x 1600]

https://i.redd.it/mek6wplj9s561.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/kf24ei/a_knockerup_before_the_alarm_clocks_wakes_factory/?utm_source=ifttt