William Barber's "Amazonian" design considered to be one of the most beautiful ever made by the US Mint. This design was issued in sets of the quarter dollar, half dollar and silver dollar in silver, copper and aluminum as above. To view the set, click here.
The Amazonian name dates to the 1890 New York Coin and Stamp auction of the Lorin G. Parmelee collection and was probably given by David Proskey.
The following examples are confirmed:
1) Farouk, Dibello-Stacks 5/70, Bowers and Ruddy Rare Coin Review 12/78, Hughes 1/80, JMN & Associates (Jeff Notrica) as PCGS65 later in Teletrade 3/3/93, Southern collection, Simpson collection - PCGS66 illustrated above.
2) Heritage 8/04, ANR 1/06, Jewell, Stacks-Bowers 8/11 ANA, Simpson-Heritage 2/21 - PCGS64
Examples were also struck in silver J1195/P1335 and copper J1196/P1336.
For additional information on this and the other denominations, click here
Photo courtesy of Saul Teichman.