skippet

At least one 1871 treaty seal was actually made using a Lewis skippet mold instead of the Masi die, meaning it too is technically an official die.

Page 2, middle left: The title is centred to remain exposed when the doucment is folded into a square and placed in its box with the cords, seal and skippet.

Page 1, seal: The silver skippet holding the wax seal bears the Royal Arms and is attached to the document with a crimson and silver tasselled cord.

Page 1, lower left: The horizontal pleat along the lower edge of the vellum is know as the plica, and provides a double thickness to carry the weight of the seal and its silver case, called a skippet.

Usually skippets were made out of sterling silver, though for the Japanese treaty following Commodore Perry's mission a golden box was used (the ratification of that treaty, made later in 1854, had an even more elaborate and expensive seal and heavy gold skippet).