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Chessie System B&O Bay Window Safety Caboose.  One of the three in the Athearn Limited Edition Safety
Caboose set.  This is a good little starter project.  I used a prototype picture to let me know that this caboose had its roof
walk.  See 903010 to see it does not have one.  Some B&O cabooses had them, some didn't.  Use a photo to
know for sure.  I put the window "glass" in myself on all of these cabooses.  It is just clear sheet styrene cut and
glued inside.  This caboose does not meet my standards today, I will retire it when I get more accurate B&O bay window cabooses built.