MIL-R-11840 Complete Document History
Railway Car, Flat, 56 1/2-Inch Gage, 80-Ton, 12-Wheel, Passenger Train Service (No Superseding Document)


Obsolete Revision Information:
   NOT - RAILWAY CAR, FLAT, 56 1/2-INCH - June 29, 1978
   BASE - RAILWAY CAR, FLAT, 56 1/2-INCH - Jan. 1, 1960