VERY EARLY ILLINOIS SPRINGFIELD "MASON" MODEL POCKET WATCH WITH 5 DIGIT SERIAL NUMBER 12170!  INCLUDES CHAIN WITH MASONIC FOB AS SHOWN. THE WATCH HAS A HEAVY GOLD FILLED HUNTER CASE WITH SOME WEAR, BRASS SHOWING IN A FEW PLACES. THE CASE IS ENGRAVED TO "FATHER."  THE FRONT DOOR IS SLIGHTLY HYPER EXTENDED. THE HINGE AND SPRING WORK. THE MOVEMENT IS IN RUNNING CONDITION. KEEPS TIME WITHIN A FEW MINUTES AFTER 12 HOURS. IT IS A KEY WIND AND SET.