Tool used to remove seeds from flax plants, before the straw goes to retting. No, this is not a hackle - a tool for threshing flax; Municipal museum Nové Město nad Metují
<a href="//commons.wikimedia.org/wiki/User:Kozuch" title="User:Kozuch">Kozuch</a>
CC BY-SA 3.0
<span class="int-own-work">Self-photographed</span>