A broadside shot clearly shows 99.5906's 0-4-4-0 wheel arrangement. Like all true Mallets, it's a compound locomotive with the smaller-high pressure cylinders at the rear and the larger low pressure ones on the articulated engine unit at the front. The loco was photographed arriving at Mägdesprung with the 16:02 from Alexisbad to Quedlinburg, train 8954, on 10 October 2015.