An animation displaying the operation of a Kalthoff Repeater of the rectangular three-chamber breech-block type. Shown is the barrel, breech block, ball magazine, ball plunger, and ball retaining spring. 
The mechanics this animation is based on are illustrated in <i>Ældre dansk bøssemageri</i> by Arne Hoff, which were also later featured in <i>Dutch Guns</i> by Arne Hoff (<a href="//commons.wikimedia.org/wiki/Special:BookSources/0-85667-041-3" title="Special:BookSources/0-85667-041-3">ISBN 0-85667-041-3</a>).
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CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>