In a formidable state for its age. This is a unit with the sought-after JRC4558D op amp chip.
The TS10 has, in recent years, become one of the most legendary vintage guitar pedals. Largely due to the influence of John Mayer, who was initially inspired by the blues great Stevie Ray Vaughan, this pedal has become staple of classic, Dumble-style blues tones. The first run of these pedals produced from 1986 - 1990 was made in Japan and featured an MC4558 overdrive chip, or the even more sought after JRC4558D chip.
