IW Harper brand was distilled at the famous DSP-KY-1, better known as Bernheim.  Some of the most highly sought after vintage expressions came out of the Bernheim distilleries.  This particular expression is a one quart size bottle, bottled in bond at 100pf with a 5 year age statement.  The "world flags" on the neck label signify some of IW Harper's advertising campaigns at the time which were "The only bourbon enjoyed in 110 countries around the world".