The ERTL New Couplings: 2003-2004

Thank you, both, for the information.

I have NEVER seen any images or listing for a long time now of Peter Sam, Rusty, Rheneas, Duncan, Smudger, Stepney, list goes on new in box (2003 / 2004 style box) with the U-hooks! I'd say any engine with a U-hook is the rarest of its type.

Does anyone have any images of the engines I mentioned?

Also not every engine had a U-hook from 2003, I remember when I got my ERTL 2003 Duck it came with two hooks NO u-hook. Maybe it was an old model in a new packaging by mistake?

Probably.