At Montrose Vintage & Exclusive gear we bring you the best collectable guitar pedals under the best conditions. Please visit our shop for further exclusive listings! The Russian Small Stone is now in good condition and in good working condition!! The Electro -Harmonix Small Stone is a four-stage phase shifter pedal developed in 1974 by David Cockerell, equipped with the legendary operational transconductance amplifier (OTA). In addition to the Rate knob, the Color switch allows you to add a feedback stage to give you a more pronounced phase shift effect. Main features: - Classic analog phaser - Uses operational transconductance amplifier (OTA) - Rate and color control Condition: Very Good!! with minor signs of wear as shown in the picture. Does NOT come with the original box.