TWO U.S. SUBMARINE COVERS - USS ALABAMA SSBN 731.   1)  USS ALABAMA SSBN 731 COMMISSIONING.  CANCEL:  UNITED STATES SHIP MAY 25 1985 ALABAMA SSBN-731.  COMMISSIONING DAY.  STAMP:  USA 22 CENTS.  2)  LAUNCHING USS ALABAMA SSBN731 MAY 19, 1984 SPONSOR:  BARBARA E. DICKINSON.  CANCEL:  GROTON, CT MAY 19 PM 1984 06340.  STAMP:  USA 20 CENTS.  S&H  $.80  OVERSEAS:  $1.85