The 1914-D Lincoln Cent is a secondary key date of the series with a mintage of 1,193,000 coins. Although the coin does not have the high profile status of the 1909-S VDB Lincoln Cent, it does present a challenge for collectors of the series.
Most of the 1914-D Lincoln Cents went into circulation, which makes high grade examples of the coin very rare. Lower grade examples are found more commonly, but problem-free coins can require some searching. Most examples feature a sharp strike, unlike other earlier Denver issues. The 1914-D remains in strong demand due to its status as a key date of one of the most widely collected series.
taken from: http://lincolncents.net/