I remember the factory sales guy stating such at a school bus drivers meeting in Bakersfield CA around 1970 or so.
That would have been Jack Parsons, Crown salesman extraordinaire!
Interesting story: Jack bought my Fresno house for cash in 2010, after selling his place in SoCA. He & his chiropractor daughter lived in it until he passed away in early 2013, she sold the place and bought a condo.
Before he moved in, we had a couple of really long conversations about the bus industry, Crown vs Gillig, and other war stories. Fascinating guy!
FWIW & HTH. . .