Some of the last production of the German Siemens RFT EL34 / 6CA7. They are compatible with the American designation 6CA7 so they are drop in replacements. Very nice tone and well built. It is the slim profile EL34 with dimple top and halo getter. They were sold for use in OEM and are unlabeled.
CALIFORNIA PROPOSITION 65 WARNING
WARNING: Cancer and Reproductive Harm-www.P65Warnings.ca.gov.