I have a demon carb I got in a trade a while back and have no use for it but I can't sell it unless I know what it is but there are no number that I see anywhere except 169 on all four throttle plates and it has a vacume secondary pod and electric choke with a single inlet and a crossover tube to fill the other bowl. The secondary venturies look like they are gonna flow less than the primaries never seen that before

How do I tell what the heck this is?