[Amps] Trying to locate amplifier

[Fuqua, Bill L]

  Many years ago (late 60's) I converted an amplifier which was a low band VHF to 20 and 15 meters. 
It had a pair of push pull 4CX250B or perhaps 4X150A tubes (no tube came with it). I parallel connected the tubes, both halfs of the plate capacitor and used the whole coil. I also use a dual 365pf variable to convert it to a PI network. I first used it for a while with 4X150s until I came across some cheap 4CX250B's.
   In any case I am looking for another one. It had some vernier dials National on the front as well. 
Does anyone have an idea what this was? I believe it was made for the military by Motorola.
73
Bill wa4lav
Please pardon my spelling. I am an engineer. Never had the spelling gene and it is really late.