The XG was built in 1895-96 with 34' long interior, 5' wheel base 30 ton capacity trucks, wood bolsters and 4-spoke brake wheels. The XH was built in 1898-1900 to the same dimensions but with 5'6" wheel base 40 ton capacity trucks, steel bolsters and fluted 5-spoke brake wheels. Over 17,000 were built. Each road had its own reporting marks. The cars were renumbered in 1905. Most subsidiaries were reduced to 2" high initials under PENNSYLVANIA or PENNSYLVANIA LINES. The MCB standards were stenciled on in 1909 and minor lettering changes made through the 'teens. System unification in 1920 brought standardized lettering to all cars. Safety appliances were added in the late 'teens, consisting of ladder grabs on the sides, extra grabs on the roof and end, and grabs on the end sill. Some cars acquired steel roofs and some were entirely rebuilt. Detail differences appear on ventilated and produce cars. Many carswere used in fast freight service. ONE PIECE CAR BODY