Vintage: AM-6155 amplifier modified for ham. Need help on what band???

WX5812

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Hopefully there is some in here that is familiar with the old surplus AM-6155 amplifiers.
I acquired one recently and the seller didn’t know much about it other than it came from a ham.
I can tell it’s had ham mods done to it as far as a PTT rca, 3 different coax switches and some work done under the tube socket. From what I can tell it does not look like it’s been modified for 432. But it’s hard for me to tell if it’s 2m or 220.
I will include some pics. Any help is appreciated.
 

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RFI-EMI-GUY

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Do you have any test equipment, such as a grid dip oscillator? You could terminate the amplifier output port at 50 Ohms and attach a resistive load at the plate output capacitor to ground simulating its high z. (read tube specs) . Then use a GDO on the tank to see where it dips and make tests through the tuning range. Failing that there were a lot of construction articles in magazines for conversion to ham bands.
 
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