This truck is the legendary Dodge Power Wagon Express. Made by First Gear for Colwell Oil Company located in Waxahachie, Texas. Colwell Oil is a Diamond Shamrock jobber operating in Texas. Shamrock got its start here in Texas, and this truck has the logo used during the 1940s and 50s. The Dodge Power Wagon became a familiar truck in the Texas oil fields. Its 4WD and ruggedness proved to be what oil companies needed to complete their jobs in the oil fields.