(A) The apparatus comprises a strong drawing board 750 x 600 x 12mm, fitted with sockets and Brackets for fixing to a wall, with two pulleys 50mm diameter, with clamp for mounting in any position; four S-hooks, scale pan 100mm diameter, WITHOUT MASSES
(B)
Two clamp type 50 mm pulleys to be mounted on a battened board 600 x 400 x
15 mm. Four "S" hooks and scale pan 100mm diameter. WITHOUT MASSES.