United States, 2012 AD., "Sacagawea Dollar" Native American - Trade Routes of the 17th Century issue, Philadelphia mint, 1 Dollar, KM 528.

United States of America, "Sacagawea Dollar" Native American - Trade Routes of the 17th Century issue, engraver: Glenna Goodacre (obv.) reverse designed by Thomas Cleveland and engraved by Phebe Hemphill, Philadelphia mint, 2012 AD.,
1 Dollar (ø 26,5 mm / 8,03 g), copper with manganese brass cladding: (Cu 88.5%, Zn 6%, Mn 3.5%, Ni 2%), 8,00 g. Theor. Mint weight, mintage 37.380.000 , axes coin alignment ↑↓ (180°), plain edge with inscription,
Obv.: LIBERTY / IN GOD / WE TRUST / GG , Sacagawea with child at her neck r., engravers initials at edge below.
Rev.: UNITED STATES OF AMERICA / $1 / Tc – PH , the profile of a Native American man and a horse in the foreground facing left and a group of galloping horses in the background, engraver´s initials r. and below.
Edge: 2012 P *** E PLURIBUS UNUM **********
KM 528 ; Schön 521 .

Year / Mint Mark / Mintage
2012 D 2,800,000
2012 P 3,080,000
2012 S 1,189,445

Sacagawea (May 1788 – December 20, 1812), also Sakakawea or Sacajawea, was a Lemhi Shoshone woman who helped the Lewis and Clark Expedition achieve each of its chartered mission objectives exploring the Louisiana Purchase. With the expedition, between 1804 and 1806, she traveled thousands of miles from North Dakota to the Pacific Ocean, established cultural contacts with Native American populations, and researched natural history.

The Sacagawea dollar (also known as the "golden dollar") is a United States dollar coin that has been minted every year since 2000, although not released for general circulation from 2002 through 2008 and again from 2012 onward due to its general unpopularity with the public and low business demand for the coin. These coins have a copper core clad by manganese brass, giving them a distinctive golden color. The coin features an obverse by Glenna Goodacre. From 2000 to 2008, the reverse featured an eagle design by Thomas D. Rogers. Since 2009, the reverse of the Sacagawea dollar has been changed yearly, with each design in the series depicting a different aspect of Native American cultures.
The coin was first suggested as a replacement for the Susan B. Anthony dollar, which proved useful for vending machine operators and mass transit systems despite being unpopular with the public. The Statue of Liberty was originally proposed as the design subject, but Sacagawea, the Shoshone guide of the Lewis and Clark expedition, was eventually chosen.
The new dollar coin was heavily marketed by the Mint in a series of print, radio, and television advertisements, as well as Mint partnerships with Walmart and Cheerios. However, the Sacagawea dollar did not prove popular with the public, and mintage dropped sharply in the second year of production. Production of Sacagawea dollars continued, since 2007 in parallel with the U.S. Presidential dollars. In 2012, mintage numbers were reduced by over 90%, in line with a similar reduction for the Presidential Dollars, due to large stockpiles of unused dollar coins.

More on https://en.wikipedia.org/wiki/Sacagawea , https://en.wikipedia.org/wiki/Sacagawea_dollar , http://www.usacoinbook.com/coins/dollars/sacagawea/