A rare and highly sought-after green-face V1 Electro Harmonix Electric Mistress Flanger/Filter Matrix pedal for sale in excellent working order.

This is the sought-after early hand-flowed board version: calibrated and sounding superb.

Both David Gilmour of Pink Floyd and Andy Summers of The Police famously used 18v Mistresses as part of their signature sound - just plug a guitar into this pedal and you'll realise why they are so highly-prized.

The 18v Electric Mistress is the best Flanger EH ever made - far superior to the Deluxe and reissue models in many ways.

This pedal sounds fantastic, offering a wide range of quality effects: from subtle chorus-style thickening through classic syrupy-rich flanging to insane psychedelic modulation.

This pedal dates from the late 70s. It's certainly seen some action but truly sounds fantastic and is built like a tank (made in USA). It wears its battle scars with pride and certainly has mojo aplenty - as you'd expect from a player's vintage EH pedal (click on the photos to zoom in).

Internally it's in good condition and in as perfect a working order as a well-used 30 year-old pedal can be. It's had four new rubber feet on the base and the battery clips are probably not original. New knobs (of the correct kind) have been fitted.

Please be aware that this is a vintage pedal and will not be as clean-sounding as modern boutique and digital units; like many vintage EH pedals (depending on the instrument it's used with and the signal chain) some volume drop can occur when the effect is engaged; this can often be solved by putting a buffered (ie Boss type) pedal before it in the signal chain (bypassed).

It's powered by 2 x 9v batteries or 18v power supply (not included). Two new batteries are fitted ready for sale.

Check this excellent and thorough YouTube demo by blondegraemey (hear it in action from about 4.5 mins in):