Alexander M. Gordon Propeller Slide Rule

---

Country of manufacture: England,            Date of manufacture: ____
Overall length: 25.5 cm,          Width: 5.8 cm,          Weight: 57.2 gms
Materials: simplex design; cardboard
Cursor: no cursor
Scales:
Front:Revolutions per Minute [ Pitch in Inches, Slip % ] Speed in Knots
Slide Back: blank
Back: blank
Gauge Marks: [      ]
Condition: C5 (Normal signs of use)
Came with: Cardboard case; one edge separated
Note: See other rules designed by Alexander Milne Gordon here.

---

---