German RMK 20/30 aerial reconnaissance and survey camera in the Aviation Museum of Central Finland. Used in Finland 1942-1981, negative size 30 x 30, focal length 20 cm, 215 images.
<a href="//commons.wikimedia.org/wiki/User:MKFI" title="User:MKFI">MKFI</a>
<span class="int-own-work" lang="en">Own work</span>