UPDATE: This sold years ago on eBay, but I never posted all the pics I got from the auction. It is a good example of Koenig’s Wrecker and road service brochure. Along with tow packages, it includes helper springs, PTO add-ons, push-bumpers, and more.
It is bulletin 155 (which likely means it was published in January of 1955) and then revised in April of 1955.
This set of brochures was also on eBay back in 2012. Unfortunately, the eBay seller didn’t scan the entire page, so some info is missing. They were likely a part of some special equipment binder, one I have yet to snag. Given FCs aren’t mentioned, I imagine this was from 1955 or 1956.