American servicemen going into harm’s way had a variety of ingenious places to hide small, even miniature, compasses for escape and evasion—in combs or razors, uniform buttons or, as seen here, in cufflinks. 
For more information on CIA history and this artifact please visit <a rel="nofollow" class="external text" href="http://www.cia.gov">www.cia.gov</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/59094030@N08">The Central Intelligence Agency</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ciagov/7375667968/">Concealed Compass</a>