Mount a size 4 low-water salmon single. Use a straight-shank hook rather than a sharply tapered one, because on this pattern the tag goes on over the tail and a tapered shank makes the tail point down.
Start black thread and run it back only as far as the hook point, then tie in a small bunch of yellow saddle hackle fibers as a tail.
Tie in the medium copper wire for the tag and rib.
Tie in black wool yarn (leave it on a bobbin. The body takes three passes) and wrap the body: pull the first wrap tight over the tie-in bump, relax as you come off it, then wrap forward and back, holding the yarn at an angle to build a tapered cigar shape.
Wrap the copper carefully at the rear first to form the tag over the base of the tail. Go slowly and hold the tail up so the wire does not spin it around the shank.
Continue the copper forward in open evenly spaced turns as the rib, and tie it off at the front.
Stack a sparse bunch of black-dyed squirrel tail, measure it back to about the end of the hook gap, and bind it down hard on top as the wing (this is tied like a Rat. Wing first, then collar).
Tie in a yellow saddle hackle and take a sparse collar, folding the feather if it will fold and stroking the barbs back so the collar slants rearward; leave room for a fairly large head.
Trim, build a good-sized head as shown in the original pattern, whip finish and coat with UV resin.