The "authentic" mark includes the ERCUIS wheel mark, the centaur, and the silver-plated marking "ERCUIS 60" (60 microns thick). ← (Photo 5) I bought this about 45 years ago as a butter knife at an imported tableware specialty store in Ashiya City. (The current new retail price for this item is 16,390 yen.) "Brand": ERCUIS "Type of Product": Silver-plated (60 microns thick) / Fish Knife "Cutlery Series Name": BRANTOME "Size": Approximately 20.0 cm in total length "Condition": No noticeable scratches or stains "Accessories": None * It is said that the silver-plated thickness of ERCUIS, at 63 microns, exceeds that of Christofle (43 microns).