Grouping of three first-day covers each celebrating the 1939 Centennial anniversary of baseball. Each of the three were postmarked June 12 or 13 of 1939 each one stmped and addressed with different artwork. Two of the three were postmarked in Cooperstown NY the third (a cover from Saint Bonaventure College) postmarked from Saint Bonaventure NY. All three appear in VG/EX condition with signs of postal use very minor toning some areas on the reverse that appear to be adhesive stains (on two of the three) and light pencil writing on the reverse of each. Three pieces total.