WW-U-536 Complete Document History
Union, Malleable-Iron or Steel, 300-Pound +Cancelled, 1969,Use WW-U-531


Obsolete Revision Information:
   NOT - UNION, MALLEABLE-IRON OR STEEL - Jan. 9, 1969
   BASE - UNION, MALLEABLE-IRON OR STEEL - Jan. 1, 1960