MS-392 PVG VIBRATION BOX

Consist of a wooden box 175 x 75 x 75 mm. with sliding glass
doors, slotted top which carries a glass tube fitted with a simple
torsion head to support a stirrup to carry magnet, base marked
with longitudinal index line. Tube length 150 mm., stirrup 50 x 45
mm. length x height. Complete with one each 50 and 100 mm. bar
magnets, one each 50 and 100 mm. brass bars