Haladie, a very rare Indian double bladed dagger. (cropped and edited from the original image)
<a href="//commons.wikimedia.org/wiki/User:Karthikndr" title="User:Karthikndr">Karthik Nadar</a>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Chhatrapati_shivaji_vastu_sangrahalaya_museum_(75).JPG" title="File:Chhatrapati shivaji vastu sangrahalaya museum (75).JPG">File:Chhatrapati_shivaji_vastu_sangrahalaya_museum_(75).JPG</a>