Both tubes belong to the third edition. Test readings are 3900 and 4000 out off minimum 1900, also sound tested without any issue. Quad is available.
2A3 NOS 1945 RCA 🇺🇸 SINGLE TUBE 🇺🇸 Made in USA 🇺🇸 1945 End of WWII
1960 RCA 2A3. In 1945, RCA 2A3 vacuum tubes were primarily used. RCA Bi-Plate 2A3 (1945-1949). Made 1945 to 1949. ( 2A3 MOTHER OF HIGH FIDELITY). The year 1945. 🇺🇸The END of WWII. 🇺🇸 Tube most likely made by a Woman of the GREATEST GENERATION EVER!