Three stories and some pin-ups about Iron Man. The first, by Jim Owsley and Greg Laroque, takes place before Iron Man #167. And yes, by 1993, we’re up to issue #300.
So this is almost certainly a shelved, “inventory” story. The second is by the same creators and, I’m assuming, also inventory.
Then there’s a Kurt Busiek/James Fry tale that’s fine for what it is.
Obviously, none of this matters and it is for completists only.
For the complete history of the MU, year by year, go here.