What is "Key", when Collecting Coins?

What is "Key", When Collecting Coins?by Robert L(wheat cents) are: 1909s, 1909s VDB, 1914 D,
Taylor, JD1922, and the 1931 S.
Key Coin: A coin that is among the toughest andThe "semi-key" dates are: 1910 S, 1911 D, 1911 S,
Most Expensive to obtain within a series. In the1912 S, 1913 D, 1913 S, 1914 S, 1915, 1921 S,
Lincoln Cent series, for example, the 1909-S VDB1922 D, 1923 S, 1924 D, 1926 S, 1931 D, and
would be considered the key, as would the1933 D.
1914-D and often the 1922-Plain.Certain Sellers use the term "Key Date" to
A coin somewhat lesser in stature but still amonggenerate interest in a coin, whose date may be
the tougher in a series to collect is called a"Key", however, the Condition of the coin is
semi-key; the 1909-S and 1931-S fulfill this roleusually less than desirable. Pay Attention!
within the Lincoln Cent series for many collectors.Have fun collecting your Perfect Coins!
The Concept of "Key" may also apply to the-- Robert L Taylor, JD
Type or Purpose of the coin collection, ratherCopyright © 2006
than the individual coin. For example, if a collectorRobert Taylor is a 59 year old retired Lawyer,
is putting together a collection of Walking Libertyfrom Denver, CO, who spent most of his career
Half Dollars, without regard to the Condition of therepresenting people who could not afford an
coins, then the "keys" are the 1921, 1921-D, andattorney, and who has had a passion for collecting
1916-S.US coins, since the age of 6. To share his Passion,
But, if the Collector is putting together the samehe created featuring US Rare and Modern Dollars
set, in Gem BU Condition, the 1919-D and the(from 1878) and US Coins (from 1960), all
1921-S would be considered the "keys" and theCertified and Graded by NGC or PCGS.
1916-S likely would not, because the 1916-S eitherFor Beginning Coin Collectors, he then created
not available at all, or is plentiful. Also Key Datefeaturing US Modern Coins, from 1960, that are
may be a replaceable term.high quality BU, Certified Coins priced less than
Another example, using Lincoln Cents: The "key$10.
dates" for the Lincoln Pennies, from 1909 -1958