Charlie,
There are more examples of the Frameless cars around.
(2) are on the Georgetown Loop RR. One is in servicable condition.
(1) is in the Museum in Golden
(1) is on the Sundown and Southern RR north of Denver.
There might be one more.
The two that are coming back to Chama have been used as storage tanks for years in La Jara. Earl has been trying to get these two back to Chama for years. The cars are missing running gear and trucks, however correct Frameless trucks are under the Framed Tank Cars already in Chama. I am sure it would be easier to fabricate new Arch Bar Trucks for the Framed Cars than to Cast new Steel ones for the Frameless.
The tanks between the Framed and Frameless are very similar but there are differences, the biggest differences are the Frame vs Frameless and the Trucks.
We could start a whole discussion just on these cars....
Kevin