We can whittle down the age and model pretty close from the pics. With the longer brush nocks, it's either a Deerslayer (62") or Hunter (66") Both were standard with hickory and fortisan backing, yew center and osage lace(This pic looks like the shorter deerslayer to me)
Fred patented the scabbard type quiver in '46, so assuming the screw and bushing are original, and running bear decals started in '48, We are narrowed to that time frame. Remember too, the Grayling move from Detroit in '47, with mass production and Nels leaving soon after and replaced by Bob Meeker.
The fact its laminated and not a self bow also suggest late Detroit, early Grayling.
Other bowyers worked for Fred, and marked the bows exactly as above but they usually worked on the lower end models like the Field, Rover and Ranger.
Anyway, she's a beauty in great shape. Maybe Wade will come along and find more clues.