The “San Francisco Label” Version (1987–1989) label indicates the pedal was distributed by Chandler Industries, which was based in San Francisco.

• Butler partnered with Chandler Industries in the mid-1980s to distribute the pedal.
• Around 1987 the relationship ended due to disputes over the design and trademark.
• Chandler continued making Tube Drivers for a short period using their own slightly modified circuit.
• These pedals (including 1988 units) often carry the “Chandler Industries – San Francisco, CA” marking.

• Built during the Chandler continuation production (1987–1989)
• Based on orig Butler’s design.
• Cream/tan enclosure with black bottom

• 4 knobs (Level, Hi, Lo, Tube Drive)
• Built-in AC power cord or 12V supply
• Large enclosure to house the tube
• Label mentioning Chandler Industries – San Francisco
• 12AX7 tube drives this pedal

Vintage Tube Drivers (including 1988 Chandler versions) typically sell roughly: $300 – $900+ depending on condition and provenance.  But this early Butler-signed versions usually command the highest prices. This 1988 Tube Driver with the San Francisco label is a Chandler Industries–era Tube Driver built shortly after Butler split from the distributor. It’s historically interesting because it represents the transitional period between the original Butler pedals and later Tube Works / Butler reissues.