Bill -
I do NOT believe the bow is mis-marked.
I would say that the 60" Kodiak Special is just that, a 60" Kodiak Special that was made with the straight limbs. Perhaps late in 1956 when they were working on the forms for the 1957 Kodiak Special, they made this bow.
In 1956 Specials were advertised in the catalog in 60", 64" and 68" lengths.
In 1957 Specials were advertised in the catalog in 62", 64", 66" and 70" lengths, but not 60" or 68".
Although the 68" was not advertised, it was made. I got one from Bjorn a few years ago and since have seen two others.
My guess is that Bear also made at least a limited number of 60" Specials like yours, as they made 60" Specials the two previous years in 1955 and 1956.
Your 60" Special has the multi-layered "I" beam that was used in 1955 and 1956 Kodiak Specials. It has from 5 to 8 thin laminations in the center of the "I" beam. I have a few very early 1957 Kodiak Specials that also have that 1955-56 multi-layered "I" Beam.
Logically, your 60" Kodiak Special fits right into the scheme of things with its multi-layered "I" beam, 60" length, straight limb design of the 1957 form, and helps tell the story of the evolution of the Kodiak Specials.
I would call your bow, a 60" 1957 Kodiak Special with a multi-layered "I" beam and brown glass.
Do you want me to just send you a blank check for the bow
Or do you have a trade in mind?