1847-1890
Provisionals
1847-57
1846 (1-4)
1851 1¢ (5-9)
1851 3¢-12¢ (10-17)
1857 1¢ (18-24)
1857 3¢-5¢ (25-30A)
1857 10¢-90¢ (31-39)
1857 Reprints (40-55)
1861-66
First Design (55-62B)
1861 1¢-3¢ (63-66)
1861 5¢-12¢ (67-69)
1861 24¢-90¢ (70-72)
1862 A-D Grills (79-85)
1862 Z Grills (85A-85F)
1862 E Grills (86-91)
1862 F Grills (92-101)
1861 Re-issue (102-111)
1870-1890
1869 (111-122)
1869 Re-issue (123-133)
1870 Grills (134-144)
1870 No Grills (145-155)
1873 (156-166)
1875 Reprints (167-177)
1875 (178-181)
1879 (182-191)
1880 (192-204)
1881-82 (205-209)
1883-87 (210-214)
1888 (215-218)
1890 (219-229)
1892-1925
1892-98
Columbians (230-245)
1894 (246-263)
1895 (264-278)
1898 (279-284)
Trans-Mississippi (285-293)
1901-09
Pan-Americans (294-299)
1902-03 (300-313)
1903-08 Coils (314-322)
1904-07 Commens. (323-330)
1908-09 (331-342)
1909 Coils (343-356)
1909 Bluish Paper (357-366)
1909 Commems. (367-373)
1910-16
1910-11 (374-382)
1910-13 Coils (383-396)
Pan-Pacific (397-404)
1912 Part 1 (405-413)
1912 Part 2 (414-423D)
1913-15 1¢-7¢ (424-430)
1913-15 8¢-50¢ (431-440)
1913-15 Coils (441-447)
1914-16 (448-461)
1916-19
1916 Perf. 10 (462-480)
1916-18 Imperfs. (481-485)
1916-18 Coils (486-497)
1916-22 Coils (486-497)
1917-19 1¢-10¢ (498-510)
1917-19 11¢-20¢ (511-515)
1917-19 30¢-$5 (516-524)
1926-1939
1918-25
1918-20 Offsets (525-530)
1919-21 Part 1 (531-537)
1919-21 Part 2 (538-550)
1923-25 ½¢-10¢ (551-562)
1923-25 11¢-$5 (563-573)
1923-25 Asstd. (575-596)
1923-25 Coils (597-606)
1923-25 Commems. (610-621)
1925-26 Commems. (622-631)
1926-30
1926-30 Defins. (632-642)
1926-30 Commems. (643-657)
1929 Kansas (658-668)
1929 Nebraska (669-679)
1929-30 Commems. (680-683)
1930 (684-689)
1931-35
1931 (690-703)
Washington Cent. (704-715)
1932 (716-725)
1933 (726-735)
1934 (736-751)
1935 Part 1 (752-765)
1935 Part 2 (766-775)
1936-39
1936 (776-794)
1937 (795-802)
1938 (803-837)
1939 (838-855)
Air Mails
1918-23 (C1-C2)
1926-34 (C7-C19)