From Piscator Flies:
Materials list:
Hook: Mustad 3665A (or 5xl streamer) #1-#8
Thread: black FWN 210d
Tail: White marabou
Body: Gold mylar tubing
Wing: Black marabou
Collar: Mallard flank
Gill: Red FWN 210d
Head: Black thread and painted eyes yellow/black
Cement: Bone Dry UV
“You can find this pattern and many of Gerry Beck’s other flies in A Compendium of Canadian Fly Patterns compiled by Paul Marriner and Robert H. Jones.”