A total of 74,400 proof coins were struck for the series.

Proof coins were struck from 1907 until 1915, all at Philadelphia.

For example, in 1999 the Philadelphia mint produced 750,000 proof coins.

Proof coins through 1842 could be ordered individually from the mint.

Proof coins are struck slowly, and generally multiple times, to bring out the full detail.

Set of proof coins packaged and sold by the mint.

Proof coins are rarely found in the bottom of grandmother's dresser.

The 1888 piece is the most common proof coin in the series, with an official mintage of 200 pieces.

Proof coins were produced at Philadelphia from 1859 on.

Roberts recommended that the dignitaries be given a set of proof coins.