Thermoquad ID

Can anyone give me an idea what size (CFM) this carb is and/or what model? The seller is local, I haven't seen it in person yet but want to know what I will be working with should I choose to buy it. Looks like some sort of aftermarket or commercial version? They say there are no numbers stamped on the base plate. Thus far communication has not been their strong suit.

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Author: gzig5