Please see pictures, and reach out if you have any questions as I'm glad to answer! Tube chart code COJ, chassis stamp C-05320, 1957 based on chasdis stamp, tweed champ. I've owned this 30 years and had it serviced apps 12 years ago by a tube tech. The original cap he replaced is included. There is a piece of masking tape in the chassis with Lilly? On it. This amp sounds amazing, and won't disappoint. It likes single coils, and barks with humbuckers..... very cool! The handle is intact and the rest of the amp is remarkable for its age. I just fired it up, and it is whisper quiet even turned to 12. Being vintage it's sold as is....it and the components are over 50 years old.... if you choose to replace components, or leave it as a time capsule is up to you. Thanks!