Craig Johnson
Lifetime member
Here are photos of my 1910 O/T, CR with double gunwales. It is interesting that the keel looks about the same as the one on yours although it is attached with screws from inside in a straight line, not staggered, but then this canoe was also previously restored so no guarantee it was original. dimensions are 1 3/4" wide 1/2" tall and the last 20" taper to 0 in both dimensions. Hope that helps, sorry it took so long, first time. Will need lots of help when I get started on mine.
Craig
Craig