Up for sale is a holy grail collector's piece for the ultimate tone chaser: an authentic, early-era Keeley Electronics Java Boost hand-dated May 23, 2006, and hand-signed inside the backplate.

This is the highly coveted, long-discontinued early production run that features a pristine, New Old Stock (NOS) Black Glass Mullard OC44 Germanium Transistor (explicitly labeled on Robert Keeley’s early green PCB architecture). Later versions of the Java Boost were forced to transition to metal-can CV7003 or generic transistors when Keeley's legendary stash of original British Mullards ran out. If you are looking for the exact smooth compression, harmonic swirl, and musical bite of the original 1960s Dallas Rangemaster circuit, this black glass Mullard build is the absolute pinnacle.

This pedal is not a transparent clean boost—it is a premium boutique treble booster engineered to push an edge-of-breakup tube amplifier into glorious, multi-dimensional saturation.

Key Features:

• NOS Mullard OC44 Transistor: The definitive germanium component sought out by tone purists for its unmatched vintage voicing.
• 3-Way Mode Toggle Switch: A top mini-toggle lets you select between classic Treble Boost, Midrange Boost, or a robust Full-Range Boost, making it incredibly adaptable to both single-coils and humbuckers.
• Its Intuitive Tone Shaping: Simple Tone and Level controls allow you to perfectly dial in the exact front-end push your rig requires.
• Hand-Built Heritage: Hand-signed with bench builder initials "MP" and dated from May of 2006 on the inner chassis plate.

Condition: The pedal is in excellent, fully operational condition with an incredibly clean circuit board. Cosmetically, the metallic blue gloss enclosure shows some light, normal surface swirl marks from careful studio use, but the graphic screen-printing is perfectly sharp and unfaded. Pedal only; no original box.

Note: Please see the included gut shots for absolute verification of the Mullard transistor, PCB markings, and inner plate signature.

Safely packed and shipped fully insured. Let me know if you have any questions!