MIL-R-3185 Complete Document History
Railway Car, Box, 56 1/2-Inch Gage, 50-Ton, 8-Wheel, Domestic Service


Obsolete Revision Information:
   NOT - RAILWAY CAR, BOX, 56 1/2-INCH - July 24, 1975
   REVISION B - RAILWAY CAR, BOX, 56 1/2-INCH - Jan. 1, 1960