Monthly Archives: January 2013

The Advent of The Zip Code

In the early 20th century it was common for mail to be sent without an address. A letter addressed to “Reginald Doe” with an address of “City” would have no trouble arriving to an addressee in the same town provided there was only one person with that name. In small-to-medium-sized towns in 1910, that was enough to ensure delivery.

In the 1920’s some post offices encouraged senders to write street addresses on mail. An example can be found here on this postcard from 1922 with a postmark reading “Address your mail to street and number”:

In 1943, due to a shortage of experienced postal carriers caused by World War II, postal zones were created. They were intended to make sorting and delivery easier within the 178 most populous areas of the United States. A typical address would then read:

Reginald Doe
1123 Main St.
Long Beach 3, California

In 1963, the “Zone Improvement Plan” was created based on a 1944 proposal by the postal inspector Robert Moon. It is a system of five-digit codes used for routing mail to a more specific location. This plan made use of the existing postal zone codes, using three prefix digits in conjunction with the existing postal zone. The previous “Long Beach 3” postal zone became ZIP code 90803.

The first digit of a ZIP code generally indicates how far west a location is. States on the east coast have zip codes beginning in 0, while Pacific states have zip codes beginning with 9. The 0 prefix was also used for U.S. Territories such as Puerto Rico and the Virgin Islands.

At the same time, the post office started encouraging the use of two-letter state codes. The theory was that compressing the name of the state would make it easier to make room for the five-digit ZIP.

In 1967 the ZIP code was made mandatory for bulk mailers of 2nd and 3rd class material.

In 1983 the nine-digit ZIP+4 was created. This includes more specific location data with the first two digits being “sector”, such as a group of streets or high-rise building, and the second two being “segment”, such as a specific city block or floor of a skyscraper.

For post office boxes, each box has its own unique +4 code. In the case of box numbers with four or fewer digits, this is simply the box number.

The ZIP+4 scheme has not been widely adopted for non-commercial mail and is not required, but it is used extensively by postal processing and sorting equipment. Bulk mailers receive a discount on postage if they pre-print the postnet barcode for the extended ZIP code on their mail.

Though intended primarily for mail routing, the 42,000+ zip codes are used for statistical aggregation by the Census Bureau and are used extensively by business for marketing and customer data aggregation purposes. It is also very common to see real estate data aggregated by zip code.

State Quarters

From 1999 to 2008 the United States Mint issued state-themed quarters. Five states were issued per year in the order in which they achieved statehood. After the state series was completed, quarters for the U.S. territories were issued in 2009. Each of the state quarters was issued from both the Denver and Philadelphia mints, making a total of 100 quarters in the full set.

Here is a list of the state quarters, with date of statehood in parentheses:

1999

Delaware (1787-12-07)
Pennsylvania (1787-12-12)
New Jersey (1787-12-18)
Georgia (1788-01-02)
Connecticut (1788-01-09)

2000

Massachusetts (1788-02-06)
Maryland (1788-04-28)
South Carolina (1788-05-23)
New Hampshire (1788-06-21)
Virginia (1788-06-25)

2001

New York (1788-07-26)
North Carolina (1789-11-21)
Rhode Island (1790-05-29)
Vermont (1791-03-04)
Kentucky (1792-06-01)

2002

Tennessee (1796-06-01)
Ohio (1803-02-19)
Louisiana (1812-04-30)
Indiana (1816-12-11)
Mississippi (1817-12-10)

2003

Illinois (1818-12-03)
Alabama (1819-12-14)
Maine (1820-03-15)
Missouri (1821-08-10)
Arkansas (1836-06-15)

2004

Michigan (1837-01-26)
Florida (1845-03-03)
Texas (1845-12-19)
Iowa (1846-12-28)
Wisconsin (1848-05-29)

2005

California (1850-09-09)
Minnesota (1858-05-11)
Oregon (1859-02-14)
Kansas (1961-01-29)
West Virginia (1863-06-20)

2006

Nevada (1864-10-31)
Nebraska (1867-03-01)
Colorado (1876-08-01)
North Dakota (1889-11-02)
South Dakota (1889-11-02)

2007

Montana (1889-11-08)
Washington (1889-11-11)
Idaho (1890-07-03)
Wyoming (1890-07-10)
Utah (1896-01-04)

2008

Oklahoma (1907-11-16)
New Mexico (1912-01-06)
Arizona (1912-02-14)
Alaska (1959-01-03)
Hawaii (1959-08-21)

2009

District of Columbia
Puerto Rico
Guam
America Samoa
Virgin Islands
Northern Mariana Islands

Mint Marks on Washington Quarters

The George Washington quarter first came into circulation in 1932. It was designed by John Flanagan, whose initials appear at the base of Washington’s neck. They can be hard to spot, since they are one of the first things to wear off of the coin.

For silver coins before 1964, the mint mark appears just below the wreath on the reverse side. Coins with “D” are from Denver, with “S” are fron San Francisco, and those with no mark are from Philadelphia. The San Francisco mint only produced quarters through 1954, but reopened in 1965.

Starting with the switch to copper-nickel clad coins in 1965 and through 1967, the quarter shows no mint mark, even though coins were produced in Philadelphia, Denver, and San Francisco.

The standard method of using D for Denver and no mark for Philadelphia resumed in 1968, but with the mint mark appearing on the obverse side to the right of the nape of Washington’s neck. That year the San Francisco mint ceased producing quarters for general circulation and switched to striking limited-run proof coins for collectors.

In 1980 the letter P was added for Philadelphia. This continued through the state and national parks series of quarters.

1953D Washington Quarter

1994D Washington Quarter

 

The Jefferson Nickel

The Jefferson Nickel first came into circulation in 1938. It was the first coin design ever chosen in an open competition and was created by the winner, Felix Schlag. His initials were not originally on the coin, but they were added in 1966.

The reverse shows Thomas Jefferson’s home in Monticello.

During World War II, nickel was diverted to the war effort and the coins were made of an alloy that was 56% copper, 35% silver, and 9% manganese. These nickels had a large mint mark above Monticello in order to be easy to identify. This was the first time that the mark P for Philadelphia was used. These were made from 1942 until 1945. After the war the nickel’s composition returned to 75% copper and 25% nickel, which it had been since 1866.

In all other Jefferson nickels prior to 1965, the mint mark appeared to the right of the building, with no mint mark meaning the coin was struck in Philadelphia.

From 1965 to 1967, the nickels were struck with no mint mark, even though they were produced in Denver, Philadelphia, and San Francisco.

After 1968, normal mint mark usage returned, with D for Denver, S for San Francisco, and no mint mark for Philadelphia. Starting in 1980, coins were struck with a P for Philadelphia.

1938D Jefferson Nickel

1943P Jefferson Nickel

1982P Jefferson Nickel