This is not really a HASAG lantern. They were made in Switzerland by Eugen Schatz and then Meinrad Aschwanden. The initial design was Hasag of course and earlier examples by Schatz may have used some Hasag parts but this one is all Swiss. I know the instruction booklet has HASAG but that is a Swizz army booklet and was not issued by the Schatz lamp company. ::Neil::