Model for a book lock clamp with a vase in a medallion; Red copper model for a mold of a book lock clamp. The show shows a vase in a medallion and is set in a rococo ornament; formed by two large; inward-looking c-volutes and below that two small; out-facing c-volutes. At the bottom a mascaron and in the top corners two ram's heads. The top is straight.; anonymous; Amsterdam; c. 1750 - c. 1775; copper (metal); cutting; l 2.9 cm x w 2.9 cm