Caterpillar Tractors and Dozers on the Prowl

Caterpillar tractors work hard at the Tri-State Gas Engine & Tractor Show in Portland, Ind.

Steve Weaver, Pittsburgh, Pa., showed his 1930 No. 10 Caterpillar grader.
Steve Weaver, Pittsburgh, Pa., showed his 1930 No. 10 Caterpillar grader.