12AX7 Hewlett Packard High Mu Twin Triode, Grey Plate Audio Tube (NOS) Clean Used * No longer available for export MRF: Amperex Made in Holland SKU: 12AX7-HP-Holland-P
12AX7 Hewlett Packard by General Electric High Mu Twin Triode Grey Plate Audio Tube (NOS) Clean Used * No longer available for export MRF: General Electric Company SKU: 12AX7-HP-USA-P