I have an OLD JJ&A here. It looks nothing like that. The bolts are not counter sunk, has JJ&A engraved in the wheel hubs, the sprocket hub looks different, etc. The shaft is solid with thread taps on each end. His early axles only had 2 bolts. That is not a deal breaker. His early axles did not have holes in the fingers of the sprocket hub either
Old school