You are looking at a real oddity bought in France last year.
It is not made a silver it looks more like pewter and brass fittings.
As you can see it is Moroccan made probably under licence from Paris.
On the front metal label it is "a veritable irrigateur systeme".
it is quite heavy and very solid with
" instructions" on how to use in French on the inside of a flap on the top.
The winding mechanism works perfectly, as does the tap at the bottom.
Underneath is marked "Etain fin" and "18".
Overall, a curious thing which may have an interesting history, given it's original purpose!