The DeArmond 610 is a unique vintage guitar effect pedal.
The effect falls somewhere between a guitar tone control and a wah pedal (the design predates wahs by a good 6-7 years) and is surprisingly effective and distinctive.
Jimmy Page used a DeArmond 610 in recording studio session work beginning in the early 1960s. Hank Marvin used one with The Shadows from circa 1965 to the early 70s.
