Symbol for the asteroid <a href="https://en.wikipedia.org/wiki/37_Fides" class="extiw" title="en:37 Fides">en:37 Fides</a>
R. Luther
1855
Luther, R. 1855, Astronomische Nachrichten, 42, 107 (via <a rel="nofollow" class="external autonumber" href="http://aa.usno.navy.mil/hilton/AsteroidHistory/minorplanets.html">[1]</a>)