Time

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Silver Niobium Coin Series (14.)

The Time - Silver Niobium Coin Series (14.)
Silver Niobium Coin - Special Uncirculated

• 14th Issue of the Silver Niobium Coin Series
• Unique color Technique by the Refraction of Light
• Mintage 65,000 pieces
• In original Box with Certificate of Authenticity

This year the silver niobium coin series honors the passage of time. The special uncirculated 25 Euro coin shows an old-fashioned clock face in the niobium core and a chronometer in the outer silver ring. Niobium is a high tech metal. An oxidation treatment forms thin oxide layers on the niobium core. The thickness of the layer defines the color. The refraction of the light causes the layer to shine in beautiful colors.