Perrygraf Shure Reactance Slide Rule

Country of manufacture: USA,            Date of manufacture: ____
Overall length: 22.3 cm,          Width: 9.0 cm.,           Weight: 30.5 gms.
Materials: cardboard shell with cardboard slide
Cursor: no cursor
Scales: 18
Front: Capacity (µf) [ Inductance (Henrys), Frequency (cps) ] Capacity (µµf) [ Inductance (mH), Frequency (MC) ]
Back: apacity (µf) [ Resistance/Reactance (ohms) ] Capacity (µµ), Frequency (cps) [ D, Q ] Frequency (MC), Inductance (Henrys) [ Reactance/Resistace (ohms ] Inductance (mH)
Condition: C4-C5 (Signs of Minimal to Normal use)
Came with: nothing