Finnish P-12-16 (left), P-12-17/1 and P-12-17/2 aircraft radios. Made by Puolustusministeriön Sähkölaboratorio (Finnish Ministry of Defence Electrical laboratory). Photographed in the Finnish Air Force signals museum.
<a href="//commons.wikimedia.org/wiki/User:MKFI" title="User:MKFI">MKFI</a>
<span class="int-own-work" lang="en">Own work</span>