Pair of Output Transformers for Push-Pull Amp. Approximate values are 1600-1700Pri Impedance to 4, 8 and 16ohm secondary. As you can see in the images, there is also what looks to be a second output winding with the green, green/yellow stripe and brown/white striped wires. I am not sure what it could be used for. Transformers are heavy at app 7.5lbs each. Wires have never been soldered. $150obo plus $40 shipping in continental United States.
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My guess is that the extra wires are for ultra-linear or “distributed load” use with pentodes, or possibly for multiple impedances. You can check for continuity with an ohmmeter between the B+ or the primary leads and the extra wires. Should be relatively low ohms (less than 1K ohm or thereabouts).