* Look for the stamp. Selmer Signet Special flutes made of solid coin silver will be stamped with the words "Coin Silver" or "Sterling Silver" on the body of the flute. The stamp will typically be located near the headjoint or on the bell.
* Check the color. Solid coin silver is a bright, white metal. If your flute is made of solid coin silver, it should have a consistent, silvery color throughout. If the flute is plated with silver, it may have a slightly yellowish or greenish tint.
* Test the metal. You can test the metal of your flute by using a magnet. If the magnet sticks to the flute, it is likely made of plated silver. If the magnet does not stick to the flute, it is likely made of solid coin silver.
If you are still not sure if your Selmer Signet Special flute is made of solid coin silver, you can contact Selmer customer service for more information.