Vintage Tung-Sol 6550 Vacuum Tube Single - Tests NOS! • LA Vintage Gear
Tung-Sol 6550 – Upscale Audio
Electro-Harmonix Pair KT88 | vivatubes.com
Made in St. Petersburg, Russia. The Winged C 6550 is considered by many to be the best 6550 tube that money can buy. Perfect for… | Vacuum tube, Tube, Vintage valve
Lot Of "2" Svetlana Electron 6550 C Amp Vacuum Tubes Russia (A10) – ASA College: Florida