The Silver Sanctum effect has been around now for as least a couple of decades and there have been different versions put on the market.
The basic idea is two small containers are given to a spectator with the request that a match or piece of toothpick or other small item is hidden in one of the containers. The containers may then be covered with an opaque container (not supplied) and when it is asserted that the magician hasn't seen felt or heard anything during the process he is able to pick the correct container having the object within!
Includes 3 pages of instructions along with the gleaming metal containers. Condition very fine.