the early 50s were a time for experimenting on semis, for various reasons, and Peterbilt made some unusual things that didn't catch on, like the Bubble Nose and the Dromedary (thanks Gregg!)

https://1-87vehicles.org/photo434/fl8664_drom_pie.php

https://i.pinimg.com/originals/46/36/f5/4636f51d0ae39a1d5ccbfa4738d6da09.png