6CA4 / EZ81 tubes

This early 1960s GE 6CA4 / EZ81 tube has gray plates and a halo getter. The red or white print on the glass has the GE logo. Tube tests as new.

This 1970s RCA 6CA4 / EZ81 has gray plates and a halo getter. The red print on the glass has the RCA logo. There is a hole in the flashing at the top of the tube. Tube tests as new with balanced diode sections.