INVICTA Leather Strap?

[Sterillium]

I have an INVITA watch a bit like the one below. It has a rubber strap, and I would prefer to change it to a leather one, but the way that the strap connects is kind of odd; rather that the usual bar clip thingy, the strap continues into the case - see orange ovoid...



Is it possible to get leather straps like this?