The hood and vaporizer are still like last Hipolito/Geniol without quick preheater , so it is a very early Geniol 150.The Geniol 150 with firemen on the nameplate do not have numbers on the bottom of the tank,which makes an exact age determination impossible. The Geniol 150 is a kerosene lamp.The thermal load is high with the small lamp ,so the jet and burner should be checked for tightness before each use.In case of draft the lamp flickers.There are two versions : brass and nickel-plated brass.The quick preheater is controversial and even unpopular with the small lamp, but if it is well adjusted,as on this lamp,then it works perfectly.