Documentary images — company attribution uncertain
image by Jarig Bakker, 17 August 2005
The website’s black-and-white photograph shows a dark band, lighter than the funnel itself, bearing a light-coloured letter of which only part of D is visible. Narrow bands above and below are also light. The FOTW image from the same website uses the name Arnold du Rietz, differing from this document’s Arthur heading.
No corporate equivalence inferred from surname or initials.