The MTH B&O c-3050 model is based on the only steel cupola caboose the B&O had. B&O cupola cabooses were usually wood-bodied, while their steel cabooses were usually bay window types. The c-3050 was the exception, and was really an ex C&O caboose, which makes the MTH model a stand-in, since it is based on a prototype Northeastern Caboose rather than the correct C&O prototype. The Northeastern caboose looks similar to the C&O type except it's cupola is centered while the C&O's cupolas were slightly offset. The C&O's window arrangement was also slightly different, although the Northeastern caboose could have different window arrangements depending on the owner railroad.
One poster on the web mentions that he has only ever seen the c-3050 in the Chessie yellow paint scheme, but he didn't say that it was never painted in the blue scheme, which it may have been prior to the Chessie merger.
Bill in FtL