MarkG -
Forgot until just now while looking the images of your 1959 Kodiak Special with brown glass on the back & belly...
I have a very early 1957 Kodiak Special with brown glass on both the back & belly.
This differs from the 1956 that had brown glass on the belly and gray glass on the back, it also differs greatly from the 1957 that had tan glass on both the back & belly.