According to reliable sources, the Krupkar company of Mr Morrison, a British car importer, exhibited a 6hp, 3-wheeler car at the 1904 Crystal Palace Show. The Krupkar name was also used to rebadge Cudells, Horches and Opels imported from Germany.
As the puzzle car isn't a 3-wheeler obviously, it has to be a Cudell, Horch or Opel built circa 1904. Engine power should range from 8hp to 30hp.