Up for sale here is this huge vintage power transformer, from the 1950s or 1960s and Made in USA.  It is marked 44705 but has no other useful markings.  

I am not 100% sure which wires are the primaries, but I tested it using the blue-taped wires as primaries.  It may also have multiple primaries.  

On the side with the primaries, I measured 57v, 7.07v, and 50v.  Figuring that voltages are about 11% high since it's unloaded and I'm using a 120v primary, that would give secondaries of 6.3v, 44v, and 50v.

On the other side, I measured secondaries of 670v, 335v, 222v, and 222v, so presumably 600v, 300v, and two 200v.  

This is a large transformer, so it should be good for plenty of current.  This is used with moderate overall wear, and looks really good.  It is guaranteed to work for you.  This has some great specs and would be awesome for building a tube amp.  Please see my pictures for details and dimensions.

US shipping and handling is $15.  If you have any questions, please ask.

I have more transformers and other vintage electronics listed--feel free to take a look!