SPENCER
A '64 KOD MAG in the shape you describe should have a great collectors value, AND... In the uncommon heavy weight of 58#, it is certainly a rare bow.
The Kodiak Magnum first appeared in 1961. The '61 & '62 miodel are very similar. In '63 Bear came out with the DOGLEG design which was pretty much a bust. The design that they came out with in '64 was a good one, to the point that it has not changed too much over the years. Look at a brand new KODIAK MAGNUM and a '64 model. Not a lot of difference other than the riser woods, accent striping and glass color. The basic shape of the riser, limbs, and total cut of the bow pretty much remains the same.
If it ain't broke, don't fix it.
Now this is not to take anything away from the '61, '62, or '63 models.
The '61's & '62's with their Brazilian Rosewood risers are beauties as well as great shooters. The '63's are very good looking bows with the Bubinga risers, but they had a problem staying in one piece, especially in heavier weights. Bear made three versions that year in an attempt to solve the cracking up problem. The TYPE I, TYPE II, and TYPE III.
TYPE I is the more dramatic dogleg design and they started cracking up almos immediately. Bear honored their warranty and replaced all that were turned in with the ...
TYPE II, which had a less dramatic "dogleg" to it. These performed better but did not totally solve the "crack-up" problem. So Bear came out with the ...
TYPE III and these pretty much more solid bows qith much less problems. These have the leaset dogleg design of the three
The main difference between the three is the abount of glass that contacted the wood of the riser, or rather the glass and the core lamination contact to the riser.
In any case, after '63 Bear abandoned that design and came out with the '64 model which was a lot more dependable.
If I remember correctly, the '63 DOGLEG series (Kodiak, Kodiak Mag, Cub, Grizzley, ???) were the only Bear hunting bows that had no glass continuing all the way across the back of the riser. All otheres either had a solid lamination of glass from tip to to, or accented laminations on the back of the risers, even though the Kodiak, Grizzley, and Cub did not have the bad reputation that plagued the '63 Kodiak Magnums.
In my opinion, if you pick up a '63 Kodiak Magum Type I or II, DON'T SHOOT IT!! = Don't even string it up. The Type III is safe to shoot.
Sounds like you got a great bow.