This is the actual <a href="https://en.wikipedia.org/wiki/Gold_Medal_of_the_Royal_Astronomical_Society" class="extiw" title="w:Gold Medal of the Royal Astronomical Society">Gold Medal of the Royal Astronomical Society</a> that was awarded to Asaph Hall in 1879.
1879. :1879
Source of Image: <a rel="nofollow" class="external free" href="http://www.usno.navy.mil/rasrev.jpg">http://www.usno.navy.mil/rasrev.jpg</a>