An Ernst Hahnel Perfektus 50, circa 1990 is my guess, in unfired condition. I have no idea of her age, but judging by her condition and build quality (a little sub-standard) I'd say within the last 2 decades anyway. There is no indication on the stove where it was manufactured. Two main pieces: the stove/burner and a wrap around draughtshield/pot support. On the top (upper left in the image) there is a '1' stamped inside a triangle and a series of numbers, what appears to be '38/369/0106'. Both the steel tank and draugthshield painted forest green. No stamping on underside of tank. Circular draughtshield/pot support is notched in place. Pump tube, vent screw and fuel cap all accessible. To remove the draughtshield one must unscrew the vent screw from the filler neck, rotate the pot support to free up the notches then tilt forward and off. The only identifying mark on the stove is the Perfektus 50 sticker below the filler neck. Standard 4-tubed brass silent burner with brass spirit cup. Slight depression stamped surrounding the extension tube. 1 piece brass silent damper stamped PERFEKTUS. Similar in design to Primus burner 4140 (although not nearly as big) without any center tube. One piece silent damper has steel inner cap with long center tube brazed to the brass outer cap. Standard brass fuel cap and vent screw, both stamped PERFEKTUS. Pump cylinder designed to stick well out from main body in order to support pumping when wrap around draughtshield is in place. Aluminum pump knob and rod. Short pump rod, brass pump cap, standard piston setup with leather pump cup. Fuel cap with hardened synthetic (unknown material) gasket. Steel filler neck, grooved. To get her running, all she needed was her pump cup oiled, a burner washer between spirit dish/burner + new fuel cap gasket (viton). 1/2 filled fount with kerosene and primed her with methyl alcohol. A tad windy tonight... Pump to generate pressure, vaporized kerosene ignited and burned white-blue. Let run a few minutes, burn was very hot and consistent, putting out a lot of heat. A decent enough stove, her unique design is what attracted me initially. Apparently this model of stove has been around since the 1930's, so hasn't much changed in 80 years.