Its a cat gun.

The lion andbtoger together are unusual. But lions did exist in the Gir Forestbl of Western India.

The other panel shows spotted cats. One has a thicker neck. So a leopard. Maybe one is a Jaguar? But one has a a less bull head and a thinner neck, so I'm suggesting a cheetah.

I love these old hammer guns. Can NFB loads be used in it?