These 3 ACF fluted side 6 bedroom/buffet lounge cars were delivered to Seaboard Air Line in '49 for use on the "Silver Meteor."  Seaboard had ACF add Budd style fluting to the roof and above the windows to match the rest of the train.  The below the window large fluting appears to be standard ACF/Pullman style.  When the high window cars were delivered in '55, these cars (Red, Stone, and Kennesaw Mountain) were used on the "Silver Star.