Please Note that this is an original 8 pin Alps RK27 series Blue Velvet potentiometer with Loudness Tap

Specifications:

Model: RK27 A50KX2 Volume control Potentiometer with Loudness Tap
Number of resistor elements: dual-unit
Shaft types: Round Slotted
Shaft length: 25mm
Shaft diameter: 6mm
Total resistance: Dual 50k
Type: Log / Audio Taper
Total resistance tolerance : ± 20％
Maximum operating voltage : 30V AC
Total rotational angle : 300 ± 3°
Rotational torque : 8 to 35mN・m
Operating life : 15,000cycles
Operating temperature range : − 10℃ to ＋ 70℃

 Made in japan
For more information please refer to www.Alps.com

Pin Number 4 is the Loudness Tap Terminal