1894-1906
YELLOWSTONE PARK SCOUTS

Chief scouts — sterling silver
Scouts — nickel-plated

Description: round; convex; pierced star; B style pin on back
Size: 2" diameter

Made by: J.P. Cook Company, Omaha, Nebraska

1898-1906
DEPARTMENT OF THE INTERIOR

All forest rangers (park & reserve), except Yellowstone National Park

Description: round; convex; nickel-silver; A style pin on back
Size: 2" diameter

Made by: John Robbins Manufacturing Company, Boston, Massachusetts

1906-1920
NATIONAL PARK SERVICE PERSONNEL

All National Park Service Personnel

Description: round; convex; sterling silver or German-silver (Director Mather had gold badge); A style pin on back
Size: 2" diameter

Made by: Lamb & Tilden, Washington, DC
     C.H. Hanson, Chicago, Illinois
     Tiffany & Company, New York, New York

1917?-1920
YELLOWSTONE & YOSEMITE NATIONAL PARK RANGERS

documentation incomplete

Description: round
Size: approximately 1-1/4" - 1-1/2" diameter

Made by: Unknown