5899 x2 NOS/NIB Sylvania Gold Label Pentode Tube-Free Shipping in the US

6C4 Hammond by Sylvania Vacuum Tube - NOS/NIB - Tested GOOD on Hickok 539B

PHILCO SYLVANIA 12DU7 TUBE RADIO VALVE NOS NIB ORIGINAL BOX PERFECT

SYLVANIA 7AG7 TUBE SINGLE 1950S BRAND NEW NOS NIB ABSOLUTE PERFECT SINGLE

6X4WA NOS/NIB Sylvania Mil Spec Rectifier Tube Pair-1956-Tested-Free Ship US

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2 x JAN-6922 (6DJ8) Sylvania Tubes*Very Strong Testing Pair*NOS-NIB*Mil Spec*#4