Is It a 1957 or 1958

[Windsurfer]

A friend and I have two identical, except for length, Kodiak bows.  One is 56 inch the other is a 60 inch bow.  Both have maple risers same as the 1957 and 1958 Kodiaks.  Both have white glass limbs as on the 1958 Kodiak sowbelly bows but have a tapered riser same as the 1957 Kodiak bows.  Both bows have serial numbers beginning with the letters ED.  Does anyone know if there is a way to tell if these bows were made in 1957 or 1958?  Thanks,  Dave the windsurfer

[wadde]

The 58 has a somewhat protruding belly at the sight window and a somewhat rounded shelf. The 57 had a flatter shelf and narrower not protruding belly. Both can be found with white glass.