Engineers Chalk Sticks.
A box of Chalk Sticks in original box, 36 sticks in a box. Made of dense Chalk. Size of box 6″ x 4″ x 2″ inches. Made by Dunlop & Ranken.
Used in the Mining Industry and other occupations for marking machinery or pieces of metal work, used above and below ground by Miners, Welders and Fitters etc.