UPDATE: Guy found some great links regarding this Bus, which was also known as Jitney (see Steve’s links in the comments). According to a New Jersey Transportation Heritage Center report dated September, 2010, there is no known C-10 in any collection. The ATHS society believes at least 25 buses were built. The Chassis is Willys, the Body is from ACF-Brill, and the model is C-10.
This picture from Flickr shows the bus was branded Willys on the front. I was surprised to see that.
From 02/07/2013: This 1947article shows an example of ACF Brill Model C-10 Bus built on a Willys Chassis. Anyone heard or seen one of these? At least a few went to Atlantic City. These were designed as small, inexpensive buses for marginal lines.