1 x offer = 1 x  pair of

2 NOS Mullard Tubes  E88CC 6922 = CCa

Labelled and sold as AEG tubes (Telefunken was a part of AEG group)

All factory codes start with 7L0 R0xx

Matched with parameter " gm test "

All pairs are unused with full emission.

I was the first to open the boxes 

with Burn-In in special device