$oo, do you have the box for the caboose? That'd be a sure fire way to know, otherwise I would feel safe to say it is the caboose Hot Water was talking about. Lucky you. Also, I believe the odd window is where the bathroom would be.
After looking at Charlie's yellow caboose with the Tomar markers on it, I think I'm going to go with the yellow one and add the markers to it for now. I'm going to have more UP locomotives in the future, so I'll be sure to get one of those reddish-brown cabooses later. For my VL BB, I just want to make a "set" from the 2014 catalog.