To be fair, not all sellers on GB are very well informed. I am thinking that "Tackle And Field" doesn't have many C&B revolvers come through their shop, especially when you look at their other offerings.
Their "IT" person probably did a cursory search online for something that looked like it and decided on a description. They probably don't even know what CVA stands for as they think CVA is the manufacturer, no photos of date code / proof marks. S/N has a "B" prefix so I am leaning toward it being an ASM with all the pertinent info on the bottom of the frame (and no photo). Not a bad start bid for an 1860 Army brasser if one was in the market for one.
Where to start? I sometimes ask all sorts of questions of the seller just to find out what they actually know. Maybe that's mean, but I really get tired of folks selling mis-identified guns.
Regards,
Jim