The first picture appears in 'Motor Traction' on 19 May 1915 with the caption: A three-wheeled, high-powered petrol motor tractor which is being used for drawing heavy loads over the difficult roads in Poland. By means of the winding drum over the front wheel and a rope anchored at a distance, the tractor can haul itself out of boggy places, or up steep gradients.
I did find the answer in an old thread on the forum. It's a Lanz heavy agricultural tractor. They were used in 3-wheel form early in WW1 and rebuilt as
The second photo is indeed a Dreirad-Lanz-Bensolmotor-Tracktor, I often confuse it with the Daimler Dreirad. According to my data, Lanz delivered 23 of them. The first pic, however, remains a mystery; no idea what it is.
