Caterpillar RD-4 Tractor
1937 Caterpillar RD-4 and 1931 Cat wide gauge 15. Owned by Russell Langworthy of 310 E. 5th St., Northfield, MN 55057, these tractors are used on his farm in Cannon Falls, MN every spring. Yes, he knows the 15 is the wrong color, but has no time to repain