Part Number: 12AT4 (Component) Part Number: 12AT-505 (Glass) Part Number: 12AT6 (No description) Part Number: 12AT6HBC90 (Ne) Part Number: 12AT7 (Tube) Part Number: 12AT76679 (Ne) Part Number: 12AT7A (Electron tube) Part Number: 12AT7AE81CC (No description) Part Number: 12AT7A-RCA (Ne) Part Number: 12AT7BRIM (Ne) Part Number: 12AT7E (Ne) Part Number: 12AT7EC (No description) Part Number: 12AT7ECC (Ne) Part Number: 12AT7ECC81 (No description)