Three little briggs (trash pump engines)

The problem is identifying these engines.

Based on the following from a Briggs user manual I think I have ID'ed the engine.

The following show the fuel pump on the carb and the text does not say anything about the tank half full so this carb is a pulsa-jet. 

According to the parts manual standard sized chrome rings are part # 297201.  Service manual is 270692-domestic.pdf.

Found a video of a similar engine. The label looks a bit more modern then what is on the one shroud I have.  All I can find of it now is this still.