"RCA" (Siemens) 6922 made in West Germany (gold pins)

This tube is similar to the Siemens 6922   Vocals are slightly bigger and slightly more forward, the highs are a bit softer and the overall sound of the tube is a bit warmer. Music is presented with a warm, vibrant acoustic. Very nice & musical, though it might be a bit dull in a system that’s already dark in balance.