matched pair. $10 shipped. true NOS
this: 2 x 6N3P-DR = 2C51 = 6385 = ECC42 5670 MATCHED PAIR TUBES! GOLD GRID! NOS! LOOK | eBay
this: 2 x 6N3P-DR = 2C51 = 6385 = ECC42 5670 MATCHED PAIR TUBES! GOLD GRID! NOS! LOOK | eBay