This image is actually a zoom-in-and-crop of a photo of an entirely different subject, but I found this four car UTLX lineup to be a compelling illustration of the diversity of the fleets of the large leasing companies during the Steam and Transition Eras. These four cars are all different prototypes, yet none were exceptions in the UTLX fleet. From left to right:

• UTLX ?5969 (first digit unknown) is a UTLX X-3, one of the most common types in the fleet
• UTLX 54771 is a GATC World War One era car with double rows of radially-oriented rivets
• UTLX 56140 is a Standard Tank Car Co post-WW1 product
• UTLX 58102 is a UTLX proprietary X type design

Enjoy!