As a collector of SRW O gauge trains I have red, green & white, red & yellow and black & yellow cabooses. I grew up beside the Spencer to Asheville line in the 1950's & 60's, spent 17 yrs. there and I don't recall any other colors other than red and maybe red & yellow. Does anyone have any evidence that there were units with green, black & white? If so please let me know. Thanks. Dave