Interesting quiver! 1963 was the first year for the 8 arrow quiver, and the only year for the aluminum hood,it also has the double arms. Your quiver hood appears, in the photo, to be brushed aluminum and perhaps anodized rather than paint??
Mine is plain aluminum and has a flat somewhat textured paint. Yours has two rivets on top of the hood and mine does does not. Mine does not have the felt on the hood and Bear never put it on quivers from the factory in later years, but that doesn't mean the factory didn't put it this one.
On your quiver the ends of the upper arm that mount to the frame seem to be wrapped around the frame rather than the two piece attachment on mine and later quivers. With the differences between ours it would appear that Bear did some design changes in that first year with your being the first/early version.