Rare Set of Matching Kro-Flite Sweetspot Irons (10) by Spalding showing the Patent Number Sept 13, 1927 to all irons except for number 19, includes 1, 2, 3, 4, 5, 6, 7, 8 (chipping iron), 17 (mashie niblick) and 19 (niblick) - all fitted with the same full length leather grips