Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Mrs. Mary P. Garrick Tulsa, was named chairman of the board of Cherokee Laboratories, Inc., and Cherco Equipment, Inc., Longview Texas."

Aerial view photograph of the grounds of LeTourneau College in Longview, Texas. Robert G. LeTourneau and his wife Evelyn founded the college, and the college grounds were constructed where Harmon Hospital used to reside.

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "APPOINTED sales manager of the special products division of Cherokee Laboratories, Inc., Harry Tipps will headquarter in Longview, Texas."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Harry Tiips, right reviews the route he and others, cluding dependents, will take to reach their jobs in Norway this summer. Ted Law jr., left, is an official with the company furnishing the contracts, Falcon Seaboard Drilling Co."

Photograph of a 360 Electric Digger, an earth-moving machine with three large bowls filled with dirt, with large wheels and motors at either end and in between the bowls, including an operator partially visible in the center part of the vehicle. The Digger is in a large, empty dirt area and a wall of scraped dirt is partially visible at the back of the equipment, with trees visible in the far background.

Photograph of the 60-ton capacity Pacemaker Series L-67 Electric Digger, first introduced in March 1960, according to Eric C. Orlemann. Its payload capacity was 60 tons.

Photograph of the R.G. LeTourneau plant in Longview, Texas. The first of these five domes, the one in the foreground, was built in 1962, while the final three were built in 1965. Two of the domes have been destroyed in separate weather events in 2018 and 2021. Each dome is 85-feet high and contains 70,000 square feet of space.

Photograph of an early version of LeTourneau's FL-50 Fork Lift Truck, shown picking up an 18-wheeler trailer. The company began making the trucks in mid-1961, according to author Eric Orlemann. A total of four of the FL-50 Fork Lift Trucks were built.

Photograph of a Series K-205 diesel-electric-drive tractor-dozer, the largest and most powerful dozer of its day, according to author Eric Orlemann. The dozing blade was 20 feet wide, and the overall working weight of the K-205 was 160 tons. Only one of these massive machines was ever produced.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet. One of the LeTourneau domes is visible in the background.

Photograph of the Model TC-497 Overland Train Mkii, the largest and most powerful of all the "land trains" produced by LeTourneau. The TC-497 was built for the U.S. Army to transport cargo in the Arctic under a wide variety of road conditions, according to author Eric Orlemann. It contained nine cargo trailers, a control car and two trailing power units. The TC-497 weighed 135 tons. Its overall length was about 527 feet. An unidentified U.S. Army official is pictured talking to the driver in the cab.