Beat eggs until light and lemon colored. Gradually beat in sugars and melted butter. Beat until fluffy. Beat in vanilla, flour, and salt. Stir in cream and mix well. Line pie pan with pastry, crimping edges decoratively. Pour filling into pie shell. Bake at 400 degrees for ten minutes. Reduce oven temperature to 300 degrees. Bake 25-30 minutes longer, until filling is set.