Most Lionel parts dealers carry the reproduction helicopters, which were made in a wide assortment of variations to match what Postwar Lionel did.
I have had quite a few helicopters pass through my hands. As far as I know, they all had shafts with a square cross section. The non-operating ones had a black plastic ring to hold the shaft in.
I have seen the non-operating postwar helicopters with three different blades:
- long blade fixed to the shaft, they turn together.
- long blade not fixed to the shaft - turning the blade does not necessarily turn the shaft
- short blade fixed the the shaft.
The operating helicopters came two ways:
- two long blades, one fixed to the shaft. The second one has a cam that locks into the first. This allows the blades to be folder together.
- one short blade.
The long blades are known to come in black or brown.
The short blades are black.
There are variations in the markings, including unmarked.
I don't remember them well enough to write about the markings or the different tail pieces.
The 419 heliport used a different helicopter, the tail piece was not a separate casting.
Chicago Line, the folks who originally made the reproductions, also made some custom decorated helicopters. The Coast Guard one is very attractive.
They also made a Coast Guard 6801 boat, 6800 plane, and 6830 submarine. (Also very nice)
Some might have been made by Bob Geller. He stops by the board now and then. Maybe he will comment.
Other odd pieces from Chicago Line include:
all olive boat - including the windshield
6820 Missile racks and afterburners in yellow