This is the famous trade dollar with head facing right by William Barber. The obverse design was copied and combined with the Amazonian reverse to produce a half eagle J1337-J1339/P1481-P1483.
Only 2 examples are confirmed:
1) Wellinger (Mehl 10/23 lot 748?), Morgenthau 9/35 auction, Burke-Bowers and Merena 5/94, Saul Teichman. This is the Taxay plate coin and is illustrated above. Click on the thumbnail to see an enlargement. This examples appears to have been flattened in a vice possibly to try to fix a dent - a huge mistake by a prior owner !!
2) Woodside, Woodin, Newcomer, Boyd, Farouk, Judd, Fred-
B/M 11/95, Superior 5/06, southern collection, Simpson collection - PCGS64 which has laminations on the left side. This is the Judd, Adams and Woodin and Pollock plate coin and is illustrated below.
The first occurrence of this design was in Woodward's 101st Vicksburg II sale and reappeared in Woodward's 104th Stetson sale in the late 1880s.
Photos courtesy of Saul Teichman and Superior.