Martin, with you of course being an authority on patents, I thank you for the correction. There must have been a world of DRGMs from 1891 to 1900. Quite a find on that 1936 Hubertus novel addition/composition/invention. That safety addition as found in the advert would pair well with the DRGM.


This was leaked our of GGCA files being a 1937 advert, I think.

Kind Regards,

Raimey
rse