Physical description

Heavy card sign printed in black. Code of Signals, including winding, pumping, interplat signals. Firing Signal printed across middle of sign.
Winding signals:
1 Stop when in motion, 1 Heave up, 2 Lower, 3 Hold fast! Danger, 4 Men on, 6, Cage at liberty, 7 Change Tanks or Cages, 8 Put drum in or out of gear, 9 Turn Air on or off, 10 Accident, 15 Serious Accident.
Firing Signal 4 pause 3 - holes charged ready to fire, 1 Heave up.

Inscriptions & markings

Boltons Print, Bendigo