I've come across an odd variation of the 64273 Lionel Lines caboose. The mold is made out of a green plastic, as opposed to black which I've always seen used in these cabooses. It is not repainted, if it was the person who did it should offer up their services! I'll upload some images, to see what you guys can make of it.
This, may help you?!: http://www.postwarlionel.com/cgi-bin/postwar?ITEM=6427
Ralph