This octal tube has 5 of 8 connector pins extant. "STANDARD", "Used or Factory Second Guaranteed", and "MADE IN U.S.A." are printed in white on the collar of the tube. The box is marked "Sheldon ELECTRON TUBE".
Manufacturer
Standard
Place Manufactured
U.S.
Identifying Numbers
Part number
12AX4 GTA
Printed in grey on side of tube
Dimensions
box: 4 in x 1 1/2 in x 1 1/2 in; tube: 3 1/4 in x 1 1/4 in x 1 1/4 in