I am working on modeling the Gotham Limited in HO scale, mostly a side project, a few kits here and there, and the consist/timetable sheet has both MS60s and B60s listed. From my understanding they are the same car. I know there were messenger service B60Bs with ventilation on the roof, but did the MS60s have those vents too? The decal sheet that came with the Bethlehem Car Works kit has a “Railway Express Angency” decal. The diagram shows it going above the number on the middle of the car. Would that have gone on all of the cars or just the ones is mail service?