"The "C" records were 'lost'. So in dating a German machine it is not possible to be exact" ~ I should have realized that since Wittenberge was in Prussia and went with the Eastern block. I think I read somewhere that the factory was used for war production but continued to produce machines for a few years after WWII. Of course, if this is true they would likely not be found in any of our markets. I was in East Germany before the wall came down and was amazed to go into a couple of department stores where they had appliances on display. Mind you there was one refrigerator, one cooking stove, etc. You had to place your order and pay for it ... then wait for it to be produced. I was told it was the same with cars.