Both tubes have 7 connector pins. The RCA logo and "MADE IN USA" are printed in white on the side. The tube is stored in a padded paper sleeve, which fits into a box with black text. The text reads "ONE EA. ELECTRON TUBE JRC 6J4 2529-PHILA 55-92 MFD. BY RCA (RCA VICTOR DIV.) DATE PKD. 11-54" and "THIS ELECTRON TUBE IS PHYSICALLY SIMILAR TO THE CV 1763 VALVE AND IN MOST APPLICATIONS SHOULD OPERATE SATISFACTORILY".
