Angelo Mangiorotti veined black marble ashtray for Knoll International Italy/ USA. It’s model number is 8532. It measures approximately 8” in length and is 3” tall. It is very good vintage condition with some minor scratches and spots. I have not polished this item. This particular ashtray (along with another) appeared in a modern auction in Chicago approximately 10-15 years ago. The lot went unsold. This a wonderful opportunity to own a piece of high end Italian mid century design.