PM-69 BALANCE ANALYTICAL, DOUBLE PAN,

TRIANGULAR SHORT BEAM
With, triangular short-armed beam, with fixed rider scale
graduated into 100 V shaped division with 0 at the center, accuracy
adjustable; a variation in the weight by 1 mg. deflects the pointer
to 5 divisions on the index scale. Falling away type arrestment,
beam remains stationery while the arrestment moves down,
equipped with vertical rider carrier