Up for auction is an RCA, what is marked after factory as 2050 tube, it appears to be and tests as a 2050 but without factory markings I will not guarantee it. Tests good on our shop tester but since I can not guarantee the type I am selling as parts or repair. If you feel lucky give it a shot, price reflects its unknown nature. All I can say is it came from a defunct tv repair shop and any after factory markings have proven to be accurate. Bid accordingly as this is as is and we do not accept returns.