The product is a 1771 Denmark 1 Skilling Danske copper coin with a mintmark of "K.M." The coin has a black (BN) color and is part of the KM#611 variety. This coin is a piece of Danish history, minted in the year 1771, and features the iconic K.M. mintmark. It is a valuable addition to any coin collection, showcasing the craftsmanship and history of Denmark during that time.