<p>A code is a system of communication in which groups of symbols represent words. Codes may be used for brevity or security. Here, a code is concealed inside the mirror of a lady's make-up compact. By tilting the mirror at the correct angle, the code is revealed. 
</p><p><br></p>
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/5416213051/">Concealment Device (Modified Ladies Make-Up Compact)</a>