New Old Stock US Military M67 Liquid Fuel Fired Immersion Water Heaters. These are new old stock and have never been fired up/used.
Complete with fuel tank, pipe, drip plate, etc. Again these are brand new from the 1980s (very hard item to find these days and won't last long). There will be a little surface rust from storage over the years. Designed to run on diesel or Multi-Fuel: Gas ok, but dangerous so not suggested.
These were designed to drop into water tanks with the purpose of heating the water.