Vintage EL34 G 6CA7 Matched Quad (4) Branded Ruby Made In Germany.  These are new old stock new in boxes NOS NIB.  From my research these might be the Ruby models made in East Germany by RFT/Siemens in the 80's or 90's.  Please research before bidding as I haven't see that many of these around.  They do look like vintage siemens single halo but again please satisfy this info with your own research.  I know some Rubys are made in China or other countries but these are clearly labeled Germany.  They have been pre tested and matched by the manufacturer with test results of 42 Plate Current and 269 Transconductance. Found at an estate of a vintage tube dealer.  Shipping in continental USA is free all other buyers responsible for actual shipping costs.