Andrew:
They are all-plastic cabooses by Kusan. Kusan made a play set in the 1950's/60's called the "Kusan Canonball" that happened to be O gauge. My brother and I each had one when we were very young and found out that we could run the freight cars as part of a train on our Lionel Christmas layout. I still use them on our O gauge layout at the end of long freight trains so that the caboose will not weigh down the end of the train. I picked up several more on Ebay. They are all plastic including the trucks and non-operating couplers. The car body cannot be removed from the chassis Therefore, I cannot light them or glaze the windows. The roof access ladders are add-ons that I acquired on Ebay. These were first attempts at painting and are not perfect. But they work well for me.
