[Boatanchors] Help identifying some transformer & choke iron

[hwhall at compuserve.com]

Today I was looking at a set of interesting heavy iron but I haven't been able to make sense of the part numbers.

One is a Thordarson high-voltage transformer labeled "T-55744".? Web searches on that number haven't been successful for finding the specs.

The other two are Triad products.? One is clearly a choke (only 2 leads) & marked only with "14420" and "30C-25".? The other appears to be a transformer labled with "7715" and also "30C-25".? Again, Web searches haven't turned up those numbers, and I'm guessing that Triad made them for another manufacturer, and the "30C-25" might be to identify the equipment they belonged to or a contract number.? 

Does anyone know how to decipher those numbers and/or locate the hardware's specs?

73,

Wayne
WB4OGM