McManus:

From what I can tell from a black and white photo of an original Don Martinez "Woolly Worm" The body is some dark shade of chenille (may Olive or Brown), the tail is Grizzly (I see barred hackle) and there is Grizzly (barred hackle) wrap so the hackle is facing forward. I think I also see some ribbing of floss or some tinsel. The tread is dark. The hook looks like a 2XL Wet Fly Hook. ~Parnelli