[Amps] 572B's again and again...

[sm5dqc at algonet.se (Osten B Magnusson)]

Got this, can someone tell me what is written below means:

Real Cetron tubes made in USA or... Date manufactured year 2002 or 1952 ?

Thanks in advance, 73 de Osten SM5DQC   e-mail:  sm5dqc@algonet.se


 >> The 572B are CETRON  distributed by National Eletronics Cetron 
 >> is part of the National group, batch code printed on base  572B/T160L
 >> 0252