Photographs of original Jock Scott patterns show this hook employed in the fly. I have seen different photos that appear to show the pattern tied on hooks of differing weight, thus I offer the hook in “standard” and “stout”.
It appears to be a sproat style that may be attributable to Mr. Sproat of Ambleside (See Francis Francis, 1867, “A Book of Angling””). It may have been eventually manufactured by Hutchinson, circa 1867.
A glaring feature is that the barb is approximately the same length as the point. Rick Whorwood gifted me an original hook that I used for the replica pattern. Thank you Rick!