NOS from bulk packaging. Sold in white boxes. Nice upgrade from modern E88CCs.

NOS. Labeled and boxed as Philips. Blackburn "B" production codes.

NOS in original Siemens Rohre orange and blue boxes. Steel pins.

NOS bulk packaged, sold in white boxes. Big upgrade from modern 6DJ8 types.

Lightly used, test as new. Mid '60s. Small getter ring.

1970s Vintage, god pins. Made in Czechoslovakia

A significant upgrade to new production ECC88/6DJ8/6922s. Sold in white boxes.

Hey Mike - those Tesla ECC88s work great in the Avalon VT-737 mic pre. I did a before/after comparison using a MIDI file and the sound quality is significantly improved. The stock Sovtek 6922s were slightly noisier (or at least one of them was) but more importantly the Teslas offered more clarity across the board.

Thanks again, great service --

Michael Kates 

Mike