Antique Moroccan Tribal Gunpowder Flask

The body and the neck of the flask is bone.
The top is some kind of hard wood and the closure is metal.
The body of the flask is decorated with alternating strips of copper coloured and silver coloured metal, rosettes (4 missing) and what appear to be geckoes.
The copper coloured metal is probably a copper alloy and the silver coloured metal a low grade of silver.
The bottom of the flask is probably also wood and is sheathed in what looks like copper or copper alloy.
There are two chip on one side of the flask, on either side of a gecko.
The flask is 29cm high and the base is 7 x 8 cm.
It weighs about 850 gm