A  fine dental tooth key from the the renowned 19th century French medical instrument make Charriere. The handle is made from elephant ivory (Schreger lines are clearly visible).

The key itself detaches from the hand by means of an attractively carved catch which allows the key to be rotated into North, South, East or West positions and held firmly in place. More commonly made from wood or bone it is rare to find a signed ivory example in such good condition.

• From the Phisick collection