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From a private vintage collection, this MXR Phase 90 is a classic script logo phaser from MXR’s early production era, featuring the iconic warm, swirling modulation that has defined countless recordings.With serial #123450, this unit dates to approximately the mid-to-late 1970s, during MXR’s original run in Rochester, New York, before later design and circuit changes.The Phase 90 is known for its simple one-knob layout (Speed) and incredibly musical phase effect—ranging from subtle movement to deep, hypnotic swirl. Early script logo versions like this are especially prized for their smooth, organic sweep and less pronounced midrange compared to later block logo versions.The MXR Phase 90 is an iconic, single-knob analog phaser pedal introduced in 1974, known for adding warm, "swooshy" modulation to guitars, famously used by Eddie Van Halen and David Gilmour. It features a simple "Speed" control, ranging from subtle, slow pulses to fast, Leslie-speaker-style wobbles✔️ Vintage script logo version (pre-block era) ✔️ Serial #123450 (mid-late 1970s production) ✔️ Made in USA — Rochester, New York