These are gold in my eyes; even though the engine could barely pull the set. I ran the engine alone and used the Army Alco or cast steam mostly. I guess the newer re-pops pull better (traction tires)
The caboose accessories in white are in the Coast Guard set 6-11905 (car #16577.. which I just broke the cabin on while getting the number off it) Two or three stretchers, oxegen tanks (2 molded as 1), A sitting "doctor" and a patient with bandaged head, arm in a sling, and possible broken leg laying down. Maybe Lionel still has those parts ?
The black missle car's uprights are kinda delicate. Many are snapped off. Shell of the engine somewhat brittle. That helicopter is the best of them imo. The blade tip "jets" give a flywheel action to it's spin. (I racked my brain for hours as a kid trying to figure out how heavier blades worked better)
The 6650 is the launcher you want for the large missles, it is the cream of the land, sea, air items imo. It will match your copter flat. (The Army Alco had the weird blue of the engine also fyi. I think it was closer to "Army blue on steel" than the deep shade)
I bought the CG set just because the caboose was a near clone to the red cross version. The fact it was on a cast flat and many other cars were so light, it also caused some issues stringlining cars in curves.
Still some of the best play value made imo.