Hopefully Dick or someone more knowledgeable than me will see this and chime in but it doesn't look like any production board and batten boat I've seen and it makes me wonder if it's a home build (how-to books like W. P. Stephens's were popular back in the late 1800's...dunno if many brave souls built them tho) or a factory one-off or prototype.
The battens look beefy and, frankly, not that straight and the ribs in one of the pics (#4 maybe) are very noticeably unevenly spaced as they rise to the sheer. The exterior stem also terminates quickly and awkwardly. I don't know, everything just looks a bit funny to me.
That being said it looks like a nice, interesting and curious boat. Maybe post some dimensions and check the usual places (stems, deck combings, decks) for serial #'s or decal shadows.
Anyone else wanna take a guess?