I just picked up a old heater today. I was told it was from Vietnam but not sure about that but I know its very old. From the looks of it it seems to be American. Small box about 12x10x10 in. with a hose attached to one side, has a screw on lid, and heater vents in the front along with 4 power outlets....says something about glow plugs. Does refer to it as a heater...on the directions. Number on the unit is 10892. I'm not in the military so I don't know anything about the heater. I thought this would be the best place to ask for information. I can get photos. It seems to be in pretty good shape. I would like to know maybe what era and what it actually is? Maybe what is worth, just anything about it would be appreciated.