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Mu‑Tron II Envelope Filter – Early Musitronics Production – Serial 10956 – Fully FunctionalThis is an early‑run Mu‑Tron II from the prime Musitronics era, with serial number 10956 placing it in the late‑1975 to early‑1976 production window. These early units are the most sought‑after versions due to their build quality, component selection, and the unmistakable tone that defined the original Mu‑Tron sound.The Mu‑Tron II delivers the classic optical envelope filter response with the wide sweep, fast tracking, and musical dynamics that made these pedals legendary. This is not a reissue, not a clone, and not a later ARP‑era unit — this is the real Musitronics original.Condition: • Fully functional • Filter sweep is strong and responsive • Controls operate smoothly • No scratchy pots • Switch is solid • Normal cosmetic wear for a 45+ year‑old pedal • No mods, no repairs, no issuesFeatures: • Early Musitronics production (1975–76) • Serial 10956 • Classic optical envelope filter circuit • Wide dynamic range and fast response • The authentic Mu‑Tron tone used on countless recordingsIncludes: Pedal only.Early Musitronics units continue to rise in value and are becoming increasingly difficult to find in clean, working condition. If you’re looking for a collector‑worthy Mu‑Tron II with the tone and pedigree that made these famous, this is the one.