Copy of the old Dunbars. I have one, found in a junk box, rusted to where it was frozen but didn't take much to clean it up and make it work. I haven't done anything else to it, so still original paint, etc. It's the only one I've seen before having been a gun show rat my whole life, I assume they're rare.
I was looking on ebay today and a guy has one with a starting price of $650. Is he on crack or are they really worth anything like that to collectors?