Military rank insignia of Sublieutenant, Spanish Air Force
<a href="//commons.wikimedia.org/wiki/User:Heralder" title="User:Heralder">Heralder</a>
CC BY-SA 4.0
<a rel="nofollow" class="external autonumber" href="http://www.ejercitodelaire.mde.es/ea/pag?idDoc=A6C807D4154D7D88C125785E00479C01">[1]</a>