Preheat oven to 325*F. Cream butter in bowl. Gradually add confectioners sugar and salt. Beat until light and fluffy. Add almonds and vanilla. Blend in flour gradually and mix well. Shape into crescents using about 1 tsp. dough for each cookie, (his directions...I think that's too small!). Place on ungreased cookie sheets and bake for 15-20 minutes. Do not brown. Cool sightly, then roll in the extra confectioner's sugar.