I saw them in the complete angler maybe 18 mths ago. I think they represent a cockabully (the the wing above the head makes them swim along the bottom kicking up sediment ala bully like) You can also get a one made by the same guys that is a small eel, havnt caught anything on that yet. The first big trout I caught 19 years ago was a 7lber on a articulated trout loved them ever since.
Teal are the originals. The plastic fin on top made them wobble, until it got smashed off on stones, very brittle.
No idea if Teal still make them or if they are even available.
Never liked them, never did any good on them, although heaps of other did.
Was at Omarama over the long weekend, the tackle shop motel there has heaps of great gear you cant find in town anymore, thunderbugs no2, minnows and the articulated trout lure, look him up! he might send them….