William Barber's sailors head design, struck in copper, similar to that used on 20 cent, half eagle and eagle patterns of 1875 and on dollar patterns of 1876. This design was also used in 1877 on dime, half dollar and dollar patterns.
About 7 or 8 examples are known as follows:
1) Col Green?, Newman-Heritage 4/13, Heritage 8/17 ANA, Heritage 4/19, Saul Teichman - NGC65RED
2) Ivy 3/80 - Proof 63RB
3) RARCOA 1/73 FUN, Sieck-B/R 8/81 ANA
4) Hewitt; Harry Bass on April 17, 1972, Harry W. Bass, Jr. Research Foundation
5) Farouk-Sotheby's 2/54, B/R 8/78 - cleaned, lacquered
6) Aker-RARCOA 8/91 - possibly the same as #5, retoned
7) Bergin-Stack's, 6/84, cataloged as copper, but Pollock says silver plated, Superior 1/90,certified as silver Judd-1499 by PCGS, Superior 5/90 again cataloged as silver Judd-1499, Fred-B/R 11/95 cataloged as silver plated Judd-1500; Berngard-Stack's 7/08 certified as copper Judd-1500 by PCGS, Heritage 7/10 certified PR63 Brown Judd-1500 by PCGS, Simpson-Heritage 1/15, Simpson-Heritage 1/21 – PCGS64BN.
8) Lohr, Byron Johnson, Hughes 1/79 - silverplated
Virgil Brand owned 2 examples, journal #s 11451 (Collins 12/1/1893) & 47959 (H Chapman's 2/12/1909 Metzger sale).
A single example struck in silver J1499/P1652 is confirmed to exist. It is ex Woodin-1914 ANS exhibit, Newcomer, Virginia collection, Heritage 1/17 FUN and is graded PCGS63 in spite of repeated cleanings.
Photo is of the Newman example and is courtesy of Heritage.