Hi, you are watching for a 5Y3 U50 tube Marconi Osram, new in box, top version 5Y3 for best sound quality

British Made

Tested super strong, black dust plate

condition: new in box

Price for one tube

relative rectifier same function: 5U4G, U52, GZ34, GZ37, 274B

+Tubes will be tested by TV7 B/U, AVO CT160 and our professional bench tester before handle to customer.

+Standard shipping is SGlink (cover by eBay) it will take 20-60 days working depend your location and custom process. If if you need it urgently, we have optional for UPS, DHL service ( 5 days - 15 days) please email if you want.

+ Please email or message to me before you want to open dispute with eBay, we will find the best solution.

Many thanks, Hao.

#TubeArtLaboratory