MONTANA

1913-14 is undated.  Truck began 1922.

1920:  70,000 ordered, but #77777, 88888 and 99999 also made and

       issued to Yellowstone Park Transportation Co.

1925:  #99999 issued to Harry W. Child, YPT Co. President.

1913-14     1 - 10444                       1924    37 -   69914*

1915      100 - 14366                       1925     1 -   81744

1916      100 - 24352                       1926    70 -  89-986*

1917        1 - 41612                       1927    80 -  94-900

1918       18 - 50591                       1928   975 - 103-167

1919       57 - 60022*                      1929   209 - 114-716

1920      282 - 60629                       1930   320 - 106-886

1921     -580 - 56856                       1931     8 - 102-377

1922      246 - 54843                       1932     1 -  86-217

1923      260 - 65460                       1933     4 -  82-698

1934-75     1-1 -  9-9999     County codes on County Code page.

           10-1 - 56-9999     County codes also on tabs 1943-66.

1937      1-11766

1959-62   20-58 A, 20-264A

1963-66   20-A384, 20-B753, 20-C195

1968-69   20-A1 reported

1970-72   12-A1 - 12-A850

1973-74   12-A1 - 12-A400

County codes assigned by vehicle registrations.

Silver Bow (1) registered 9,312 1934, 10,511 1935; Yellowstone (3)

also passed 10,000 in 1935.

1976-91 BICENTENNIAL BASE

1976  "JUN 76"   1-1 - 9-999999    County codes same as 1934-75.

                10-1 - 56-99999    Replaced 1991.

1988-96 CENTENNIAL BASE            No I,O,Q used.

Jan.87  "1 88"   1AAA1 - 9ACZ99    Optional extra-cost issue.

                 10AA1 - 56AJ99    Replaced July 1995 to June 1996.

1991-2001 SKY BLUE BASE                      No I,O,Q,R,V used.

1-2-91  "7 91"   1P-1A - 9P-9999Z            Replaced March 2000 to

                 10-1A - 56-9999Z            February 2001.

2000            3P-1AA - 3P-127AB added (1,126 P)

2001-06 BIG SKY BASE                         All letters used.

3-1-2000          1-A1 - 9-C99999            Replaced 2006, except

                 10-A1 - 56-F9999            "PERM" registrations.

2006-10 GOLD MAP BASE                        All letters used.

2006  "12 06"     1C-1 - 9C-99999, 1C-1A - 1C-9999Z

                  10-1 - 56-99999            Replaced 2010.

LETTER SERIES

12/20/06   3C-1A - 3C-6679G   (3C-0628L reported - leading 0?)

11/23/07   4C-1A - 4C-3748D

3/13/08    7C-1A - 7C-4531B

8/28/08    6C-1A - 6C-8667A

2010-23 TREASURE STATE BASE                  No I used.

2010 "JUN 10" 1-00001A - 9-99999E

              10-0001A - 56-9999N

OPTIONAL BASES                               No I,O seen.

All are flat and use combined numbering system:  AAA-001 - CRH407

Hyphen and space removed at ALZ series.