Specification:
At one end of the base are two 50N spring balances with hooks and at the other end are two corresponding wrest pins.
A wooden resonance box 1140mm long, 125mm wide and 100mm high.
also included are three bridges; one large (to span wires) and two small (for the individual wires).
With two steel wires, 30 swg, 1 metre long.
