6201, GE USA, Triple Mica, Square Getter Valve, ECC81 12AT7, Owensboro March 1965 Production
6201, GE USA, Triple Mica, Square Getter Valve, ECC81 12AT7, Owensboro March 1965 Production
6201, GE USA, Triple Mica, Square Getter Valve, ECC81 12AT7, Owensboro March 1965 Production