This pattern is a muling using the obverse of J615/P680 with the reverse of J618/P687. The earliest known appearance for this pattern is for a copper example is lot 1459 in Elder's 9/35 sale. See below for more details. Examples are known as follows: Nickel or copper-nickel J617C/P684 which is unconfirmed Copper J617B/P685 with the only confirmed example ex Elder 9/35 lot 1459, B/M 5/92, Simpson-Heritage 9/20, Bourne - PCGS64RB, illustrated below Aluminum J617A, J620A/P686 with 2 known as follows: 1) Winthrop B/R 9/75, StacksBowers 8/12, Heritage 11/12 - PCGS64, illustrated at top of the page, click on thumbnail to enlarge 2) Simpson-Heritage 11/20, Bourne - PCGS65, illustrated below Photos courtesy of PCGS.