Thompson Row Boats

I was wondering about the two styles of hulls I've heard about. There's the cove & bead and the style where the boards are butted together then covered with canvas. (strip built?) What years were each style offered, or were both styles available during the same years?
I've been looking for a nice one that I can afford and I prefer the cove & bead style so I can finish it in natural wood with a leakproof finish.
Thanks
Verne
I've been looking for a nice one that I can afford and I prefer the cove & bead style so I can finish it in natural wood with a leakproof finish.
Thanks
Verne
