Thanks Dan. So Goerz or Zeiss made the GLASS part and B&J made the METAL parts. The serial numbers were assigned by B&J. Sorry for being so slow on this.
What still confuesses me is the lack of the aperture scale. Did B&J release re-mounted Dagors without aperture scales? Seems odd that they would since they went to the trouble to make the front cell holder and engraved the name ect on it. Has anyone seen B&J Dagors with a blank aperture scale besides mine?