The "D1" is the smallest power to move ground: the spade each operator has on board to clean his machine. Besides a cooler, his lunchbox is the D1 an indispensable tool for every operator. Without this tool, he cannot keep his machine in operation.
Ad Gevers made the D1 as a present for his friends. Of course in brass and exactly in 1:50th scale. This is what you call eye for detail with a big wink. A MINI masterpiece.