I’m not sure what’s more appealing to me, the truck or the beautiful artwork in this advertisement. The Peterbilt 451 was only sold in small quantities, perhaps only to the carrier shown in the ad, Ringsby. The design allowed a very short bumper-to-back-of-cab, or BBC dimension, enabling a sleeper yet leaving room for a high volume truck box for low density loads such as empty containers, on the tractor. This configuration is known as a dromedary – like the camel. Drom for short.
Here’s a photo of the real thing. Not quite as eye-catching as the advertisement. These were built in 1956. Freightliner offered a similar design, starting a few years earlier.