Original Tocos (Cosmos) RV24YN Carbon Industrial Panel Controls Rotary Potentiometer.
Mechanical Travel: 300゜±5゜
Power Rating: 0.25 Watt
Shaft Length: 20mm (about 0.79 inch)
Rotational Life: 15000 Cycles
Operating Temp. Range: -10 to 85゜C
24.6mm diameter, single-turn industrial panel controls.
Carbon film element.
Linear tapers.
Metal shaft and bushing.
Panel mount only.
100% New, Never Used.
RoHS Compliant.

Datasheet:
http://tocos.com/part-number-index
http://tocos.com/uploads/media/products/0001/01/f693d36948d444a8f9baf0e0a4a9669a5e73af30.pdf