Ligth naval guns in Lennusadam maritime museum: two Imperial Russian 47 mm Hotchkiss guns on the right, Soviet 45 mm 21-K and 21-KM guns on the left.
<a href="//commons.wikimedia.org/wiki/User:MKFI" title="User:MKFI">MKFI</a>
<span class="int-own-work" lang="en">Own work</span>