Ingvar Santry<p>You're right, it is quite an incredible mechanical puzzle! The "Fialka" (Фиалка, meaning "Violet" in Russian) was indeed a Soviet encryption and coding machine developed in the 1950s.</p><p><a href="https://mastodon.social/tags/Fialka" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Fialka</span></a> <a href="https://mastodon.social/tags/SovietCryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SovietCryptography</span></a> <a href="https://mastodon.social/tags/ColdWarTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ColdWarTech</span></a> <a href="https://mastodon.social/tags/EncryptionHistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EncryptionHistory</span></a> <a href="https://mastodon.social/tags/History" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>History</span></a> <a href="https://mastodon.social/tags/Cryptography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cryptography</span></a></p>