Two Pennsylvania National Guard Mexican Border Service Medals

United States; Bronze, obverse illustrating the right-facing bust of William Penn, engraver marked "DAVISON PHILA." at the base of the bust, surrounded by the inscription "PENNSYLVANIA NATIONAL GUARD 1916 / WILLIAM PENN", reverse illustrating Liberty holding a shield in her left hand and a sword in her right hand, standing beside a border stone marker with "US" on one side and "MEXICO" on the other, with an American eagle confronting a Mexican serpent in the foreground, inscribed "MEXICAN BORDER SERVICE" above, 34.8 mm each, one with its original ribbon with pinback, the other with a replacement ribbon, better than very fine