Wow! I haven't seen those last two shots, very cool!
At the moment "Blue 4" is still a missing puzzle piece for some of us (along with the rest of "blue squadron"). It's generally agreed that it's a "Pyro" construction-wise, but painted up with more care than the non-heroes normally get. We don't know when they were made during ANH production, where/if they were used, and what became of them.
In those other two, it's hard to say which ones they are, but to me, it looks like Red 1 "in the lead" in that bottom shot.
At the moment "Blue 4" is still a missing puzzle piece for some of us (along with the rest of "blue squadron"). It's generally agreed that it's a "Pyro" construction-wise, but painted up with more care than the non-heroes normally get. We don't know when they were made during ANH production, where/if they were used, and what became of them.
In those other two, it's hard to say which ones they are, but to me, it looks like Red 1 "in the lead" in that bottom shot.