Offered is the RCA 12AX7A/ECC83 Twin Triode. Clean. Good condition. Tests strong on the Jackson Dynamic tester with no shorts or inter-element leakage. Short Grey Ribbed Plates with a Halo getter and excellent silver flashing. Production code is DD or DO, either 1970 or 1971 production. Suitable for replacement use in your best amp or Hi Fi rig. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.