Operating Era: 1904-1934. THIS SERIES NOW COMES WITH OUR NEW ONE-PIECE ROOF FRAME. Pennsylvania RR, Pennsylvania Lines, Empire Line, Union Line, American Railway Express (Adams), Fruit Growers Express. The RF class was built on the same underframe and with the same dimensions as the XL box car. About 2,800 were built beginning in 1906 for PRR and PL with a number of billboards. The XM class was also produced, identical to RF in appearance but without ice bunkers. When the cars were upgraded in the `teens they were given safety appliances and steel roofs. A number of cars were transferred to express service under contract to Adams Express and later, American Railway Express. In 1922 when Fruit Growers Express was formed, all but the express RF`s were transferred to it. The cars ran for FGE as late as 1934. Modenized kits model the cars with metal roofs and ladders. Stripes are included in the decals where appropriate. Lettering covers the life of the car. PLEASE SEE OUR VENTILATED BOX CAR SECTION FOR OTHER #2700 SERIES KITS.