Paterek - a trekking tandem custom tandem made for Gary and Irene Sanderson in Wisconsin by Timothy Paterek in 1958 and only used a few times for camping tours in Wisconsin, Minnesota, Indiana, and Michigan. This well-made tandem has a bottom tube with fittings built-in that enable it to be filled with fuel for cooking to be carried for use in a camp cooking stove. This tandem is ready to ride away. Gary Sanderson Collection.