Touring Peterbilt's 75th anniversary trailer at the 2014 Mid America Trucking Show

The custom-built, double-expandable, 53-foot "Peterbilt 75th Anniversary" trailer houses an interactive video display, an MX-13 engine, even a complete truck cab cutaway.

The trailer is hauled by a special Model 579 "Anniversary Edition" tractor.

The OEM plans to put its "history trailer" out on the road for a year to visit Peterbilt dealerships and other trucking events

Visitors entering the trailer are greeted by the iconic Peterbilt logo.

The "History Walls" within the trailer highlight significant milestones and products over Peterbilt's 75-year history, from the first truck manufactured in 1939 to the company’s latest Model 579 and Model 567 units.

An original grill from the early 1939-era Peterbilt trucks is mounted near the entrance on one wall.

Seat designs get prominent placement within Peterbilt's history trailer.

A wall chart detailing how trucks have changed over the last 75 years.

Full cab and sleeper berth cutaways for the Model 579 and Model 567 are showed off in the trailer.