A Knocky-Up Board.
This iron framed slate board is from the North Eastern coalfields and widely used down as far as the Midlands. These wrought-iron and slate boards were screwed onto the front of the miners houses upon which the occupants would chalk the time they wanted to get up in the morning, a “knocker-upper” employed by the company would walk the area and knock you at at the time written on the slate.
Made from cast-iron. Size 16″ x 11″ inches.