A Dublin knocker up, unspecified date (early 20th Century).

He had no ‘snooze’ button.

Via vintage site Rare Irish Stuff

A knocker-up (sometimes known as a knocker-upper) was a profession in Ireland that started during and lasted well into the Industrial Revolution and at least as late as the 1920s before alarm clocks were affordable or reliable.

A knocker-up’s job was to rouse sleeping people so they could get to work on time… In return, the knocker-up would be paid a few pence a week. The knocker-up would not leave a client’s window until they were sure that the client had been awoken.

Rare Irish Stuff (Facebook)

Thanks Spaghetti Hoop