History: Before alarm clocks were affordable, 'knocker- ups' were used to wake people early in the morning UK around 1900 (612 × 688)

https://i.redd.it/csy66j44jhe11.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/951uji/before_alarm_clocks_were_affordable_knocker_ups/?utm_source=ifttt