(!!!) (Recommended Pair) 12AZ7A GE Admiral black plates NOS 1960 (10/9ma and 9.2/10.5ma) (McIntosh MC275)

1 pair) 12AZ7A GE Admiral black plates NOS 1960

1 tube) 10/9ma and Gm=5500/5400 

1 tube) 9.2/10.5ma and Gm=5300/5600 

Good Ma range 8-10ma

Good Gm range 4500-5500

- 12AZ7A is very similar to 12AT7

- 12AZ7A in McIntosh MC275