This could likely be 2 or more questions, but the primary question is who made this insulator. ?

I have tried to point out the main features with the one picture. First, the intertwined CN in a recessed oval. Who made it? Does anyone recognize this intertwined logo ? Also note the recessed or depressed mould line between the 2 halves. That is certainly not common.

I have never seen this marking before, but that now brings me to the second question. Are there any known Porcelain Gingerbreads with makers marks on them.?

And the 3rd question is, do we know who made any of the porcelain Gingerbreads?, and if we do, is there any way of identifying these pieces?