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GZ34 Vacuum tube (thermionic valve) from a Leak Stereo 20 amplifier, circa 1960. Camera: Nikon D200 with old 55mm Nikon macro lens.
GZ34 Vacuum tube (thermionic valve) from a Leak Stereo 20 amplifier, circa 1960. Camera: Nikon D200 with old 55mm Nikon macro lens.
