Capacitance Substitution Box

With 8 preferred value capacitors mounted on a small baseboard with termils for connecting in a circuit. Values of capacitances available are 0.001, 0.0022, 0.0047, 0.01, 0.022, 0.047, 0.1 and 0.22uf rated at 100V.DC. Desired value selectable through a rotary selector switch with positive click stops.