This is the reply from Orvis regarding an inquiry I made about my Hardy made CFOIII:
"The CFO III is 3" in diameter, 31/4 oz. and has a capacity for Weight Forward 4 Weight Floating Line
with 100 yards 20lb Backing, or WF5F Line with 75 yards of 20lb Backing, or WF6F 50 yards of 20lb Backing".
Also from the same era:Original CFO Reels.jpg
The prices will bring tears to your eyes!