This is a closer view of the green ink-stamped KG / GK marking on the [id=310834572; larger piece] . The black mark at the bottom of the cable groove was caused by a minor "injury" in the glaze. Seller thought it may be from Italy, but if I remember correctly, there is no letter K in the Italian language ? My own wild guess is that it may be from Germany or Switzerland. It is very close to the dimensions of a U-1741.