Cast iron snail incense burner

This cast iron incense burner is about 6" long x 3" wide x 2.5" high and weighs 1 pound 4.3 ounces. It is not marked. I bought it hoping to prove it is Japanese but there are no maker or export marks on it. I suspect it to be by a Japanese company that uses an oval label with drawing of Mt. Fuji in the background and "JAPAN" written under that. I could not find another example of this snail so have to hope that a labeled example will someday come to light. It does have a faux bronze finish common to the company's products.