Toshiba Vacuum Tubes 6R-K19 and 1 other unknown model - Model: 6R-K19, Unknown model number - Brand: Toshiba - Type: Vacuum Tube - Condition: Believed to be unused. Found in a storage room at my parents' house, the outer boxes show signs of aging with dirt and tears. Please check the photos. Performance is not guaranteed due to long-term storage. No claims and no returns accepted.