Few artifacts capture the spectacle and entrepreneurial spirit of early American amusements as vividly as a Dunbar popcorn wagon. Built at the height of roadside commerce and traveling entertainment, the Model 4 represented one of the firm's most ambitious and visually striking designs-combining ornate craftsmanship with practical, revenue-generating function. Manufactured by Dunbar & Company, a leading name in the production of concession wagons during the early 20th century, this Model 4 example was delivered new in June 1930 to Roy Ruttler. By December of that same year, it had passed to brothers F. James and Ferdinand Thompson, marking the beginning of a remarkable chapter in American small-business history. From their base in Altoona, Pennsylvania, the Thompson family would operate the wagon as the cornerstone of their amusement enterprise for the next five decades. Originally mounted on a 1930 Chevrolet 1½-ton commercial chassis, the wagon was thoughtfully updated in the early 1950s with a 1947 Chevrolet platform, ensuring continued usability while preserving its distinctive Dunbar-built superstructure. This sympathetic evolution reflects the practical realities of a working commercial vehicle, one that remained not merely preserved, but actively employed. By 1963, stewardship passed to the youngest Thompson brother, Leo, who maintained its operation into the 1970s. Its final caretaker, grandson Ferd "Jim" Thompson, relocated the wagon to Sarasota, where it continued to delight crowds in full working order, an increasingly rare distinction among surviving examples. Acquired by the St. Louis Car Museum in October 2021, this extraordinary popcorn wagon stands today as both a functional artifact and a deeply personal heirloom. Its 91-year continuous family ownership, coupled with decades of documented operation, sets it apart from restored or static examples. An emblem of American ingenuity, showmanship, and small enterprise, this 1930 Dunbar Model 4 Popcorn Wagon offers a rare opportunity to acquire a centerpiece-quality concession vehicle, equally suited for museum display, private collection, or continued exhibition use, infused with a story as rich and enduring as the traditions it once served.