This obverse was taken from the $50 half union pattern of 1877 J1546/P1719.
It is a repeat of the same design from 1879 used on J1617-J1621/P1813-P1817. It was also part of a goloid set. To view Barber's set which included this design, click here.
It was struck in the following combinations:
Silver or Goloid J1645/P1845 with over a dozen known. It would be interesting to test these to see if any of these are actually Goloid.
Copper J1646/P1846 with over a dozen known.
Aluminum J1647/P1847 About 5 are known.
Photo courtesy of Heritage.