Looks koftgari to me, too - and perhaps some black paint / pitch / enamel to help rust and dust fill in between the Xs?
Usually there is more than one direction of scratches, which is obscure on this, a couple hints but less obvious than usual. I'm having trouble deciding if the silver was applied in wire or foil form, right now it looks like small snips of wire due to the uniform line thickness and sharp inside corners on the Xs, but I might come up with a good theory for foil later on...
