I new about the 45 prototype and the shotguns, a friend has a Hi-Standard 410 pump. I didn't know about the Dan Wesson.
I got my info from The Blue Book of Gun Values, it states " Model G-380 centerfire-.380acp., only in-house production of a center-fire pistol"
I have one of the .357's but it looks like someone kept it in a bait bucket and cleaned it with a wire wheel... and I am not joking about the wire wheel.