Back again (finally).... Glad you got that info from Sandy since I'd forgotten about the Apte Too - although I had a few of them in my master's box and they are a bit different in several ways than the old Cockroach...
First things first - here's my Furnace Squirrel (the pattern I thought that photo showed...) on a 4/0 hook - tied just like a Cockroach with a splayed tail -either furnace or badger neck hackles, set up for snelling....
Now here's a few of the Apte Too bugs... they're tied differently (almost the way Deceivers were done with the tail neck hackles turned inwards "streamer style". The body (which can't be seen in the photo) was either gold or silver diamond braid (occasionally pearl diamond braid). The collar or head was always gray squirrel - not red squirrel like the first photo...
Note that one of the Aptes was done with a double wire weedguard -that was a specific request from another customer...
Lastly, this photo shows both the Furnace Squirrel and the Apte patterns together so that you can compare them...
Back then (maybe 30 years ago now, or more...) we used either Tiemco 800s (no longer available anywhere...) or Eagle Claw Billy Pate hooks quite a bit for tarpon flies.. It was only quite a few years later that the Owner Aki and the Tiemco 600s came into prominence in flies tied for shops...
Hope this helps...