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I see.

Yes, he seems to have forgotten to mention the desired actual "Sourpuss" model which is entirely different from what he is talking about above.
The Sourpuss model is not to be confused with the general term of the smirk bow which looked like a Sourpuss face.

That is a 1971 Sport model in your last 2 photos.

I gave the catalog description above on what a Sourpuss model is directly from Boston Whaler catalog.
Below is a photo of the genuine Sourpuss model from the catalogs.