Please see that attached photo from the MRHTS archives. It shows George Hockaday standing on what appears to be the same AFMSA locomotive with the Monon lettering showing through the AFMSA paint job. Information with the image says it is former Monon #55, so apparently George Hockaday, during one of his trips to Mexico when he worked for Alco, located the locomotive, and confirmed it's origin. The other man in the photo is unidentified. / Ron
PS, Tim, in case you're wondering, this photo has not been retouched or Photoshopped.