No not their only code Berlin Lubeck Maschinenfabrik codes are S/237, 237, duv.
And qve late in the war... I wouldn't buy a dwc buttplate just due to the ordnance code. Unless it is really cheap. Not a lot of use for a loose buttplate and not too man buttplate collectors. Good for a parts bin I suppose, but not likely to come in handy anytime soon. They are not that rare either... less common than brg, bpr, gqm, but that doesn't mean much. If it is serialed it is even worth less.
Hello,
along with the DWC on BLM I have also seen JWH parts heavily reported on BLM rifles, what are you others seeing on the JHW marked parts?
later
vaughn