Vintage adjustable countersink depth gauge tool, featuring a cast-iron bell-shaped guide and graduated hex shank marked “½” and “PAT'D.” This style was commonly used by boatbuilders, cabinetmakers, and patternmakers to achieve uniform countersink depths. The adjustable stop collar and locking screws allow precise control.

Condition:
• Solid and functional
• Some oxidation and surface wear consistent with age
• Missing the original cutter bit (accepts standard tapered countersink cutters)
• Patent marking and graduations still visible

LIST NOTE - BOX g