There seems to be a Salmon version also.
Anyhow trawling thru my flybox I have found a few from a few decades back ! They are most definately ST versions tied on small doubles , 14 s.
Pattern is :
Tail : A few teal fibres
Body: Rear third ,yellow or lemon seals fur or floss, remainder of body grey seals fur or floss.
Rib: Silver
Hackle: Soft , Grey Hen hackle
Wing: Could be starling as it is grey ,anything grey would suffice. I have seen it mentioned elsewhere that mallard can be used also.
It certainly was a good pattern going back in time and probably is seldom used nowadays but I've no doubt that it will take a trick or two.
Alan