There is a wicky stove, Coheat, probably from the 50's - 60's, could be earlier, very much like your Hasag. Cracking stoves. The Coheat can be regulated. The pre-heat time is equivalent to any pressure stove, boiling time is just as good.
Hi, the stove is from before 1945, because german companies were forced after second Worldwar by the allied fores to mark all products with " made in West Germany" as a kind of shame pattern. But it had the opposite effect, it started to stand for a very good product quality. Here is a picture of my stove I just bought, couldn't find a Modell number yet.