1851 - Toppan,
Carpenter, Casilear & Co add an imprint to their
May 10, 1861 - Postmaster
General Blair awards a contract to National Bank Note Company, who started
putting their imprint on plates.
1873 - Continental Bank Note Co. is
awarded the contract to print stamps. The National plates, dies and
transfer rolls were turned over to Continental, who made new plates of the
December 1878 - National, Continental, and
American bank note companies are consolidated into the American Bank Note
February 1879 - The
stamp contract held by Continental is assumed by American Bank Note.
May 1906 -
Siderographer Charles Vermeule (C.V.) initials plate
1908 - Plate
Finisher John Reding (J.R.) initials plate 4959 (335 and
1909 - Stars (¶-open
and «- solid) are added
to the BEP imprint to indicate variations in separation between
1910 - The letter A is added to the BEP
imprint to indicate uniform spacing of 2¾ mm between
December 31, 1915 - The first experimental plates
marked S20 go to press. They
are followed later by plates marked S40, S30.
May 14, 1918 - William T. Robey purchases
“Inverted Jenny” pane of 100 (C3a).
May 15, 1918 - Plates for bi-color stamps are
marked TOP to reduce of the possibility of a sheet being inverted on its
second pass through the press.
May 9, 1919 - The letter F is added to the
selvage to identify an approved hardened plate.
May 1920 - Otto A.
Myers inscribes his monogram in the margin of plate
Siderographers/Plate Finishers instructed to stop putting initials on the
front of plates.
February 12, 1933 - Georgia Bicentennial
Issue released with C.S. marking indicating that the plate had been
1933 - Electric Eye
margin line and dashes experimentally used.
1935 – First
Electric Eye plates made for 2¢
April 1938 -
Electrolytic plates for 6¢ Airmail issue (C23) marked EI (electrolytic
1939 - Electric Eye
frame bars and gutter bars first used.
November 23, 1962 - Booklet pane 1213a is
issued with a label stating “YOUR MAILMAN DESERVES YOUR HELP KEEP HARMFUL
OBJECTS OUT OF YOUR LETTERS.”
May 5, 1964 -
Battle of the Wilderness
(1181) issued with Mr. Zip and “Use Zip Code”
January 29, 1966 - 6¢ FDR (1284) issued
(only on Bureau precancels) with “Mail Early in the Day” and “Use Zip
Codes”. The Surrender at
Saratoga American Bicentennial Issue (1728) was the last stamp issued with
a “Mail Early” slogan.
1977 - USPS
Philatelic Release No. 57 announces that the designs of all postage stamps
and postal stationary items would be copyrighted.
January 11, 1978 - The Indian Head Penny
issue (1734) issued with a registered slogan.
September 23, 1978 - John Paul Jones US
Bicentennial (1789) issued with a copyright notice.
1986 - USPS abruptly
retires Mr. Zip after 22 years of dedicated service. Stamps with
Zip slogans continue to be issued until 1994
February 18, 1990 - USPS prints
biographical information [“Luis Munoz Marin (1898-1980. First elected Governor of Puerto
Rico, 1948. Founder of
Commonwealth.”] in the selvage
of Scott 2173, the first stamp in the Great Americans series to contain
July 24, 1992 - The Wildflowers
(2647-2696) pane of 50 issued with a diagram which identifies position,
shaded in grey, on a sheet from which the pane was
January 21, 1994 - The Edward R. Murrow
(2812) commemorative is released with the calculation of the price of the
pane in the margin.
July 29, 1998 - Breast Cancer Awareness
semipostal (B1) is issued with bar codes and item number in the
March 16, 2001 - Diabetes Awareness stamp
(3503) is issued with a web site in the margin.