I have two Model 51 radio generators for sale. The first is the tagged version, correct for 1951-1955. It is missing the fan, I'm not sure if someone altered the armature or installed a different one, $50. The second is the stamped version, correct for 1956-1957. It is complete with the exception of the fan shroud, $75. Both generators are untested, but spin freely and don't appear to be burnt.