[Mondial]

Mark, the outside of the transformer may look original, but the innards may have been replaced. The solder connections definitely look like some work has been done. Here is a link to a page where just such a replacement has been described  ( third topic):

http://www.oldradiosrus.com/build.html

You might try applying an audio signal to the primary winding of the transformerand see if it appears at the grids of the 6L6s, just to confirm if it is actually good or not.