Grizzly King from the illustration in Favorite Flies and Their Histories by Mary Orvis Marbury

Hook: sproat - size as desired, smaller for trout, larger for bass
Thread: claret
Tail: red, long (turkey shoulder)
Rib: gold oval tinsel
Body: green dubbing
Wing: rolled mallard flank
Hackle: soft grizzly

Head cement recipe:
Goop
Xylene (epoxy thinnner)

Instructions:
Fill a quart jar half full with Xylene
Squeeze a tube of Goop into the Xylene
Shake until the Goop is dissolved; add Xylene to desired consistency

Apply with a pin or needle dipped in the liquid

https://youtu.be/AJbvJUixaCs