Austria - 25 Euro - 2016 - Time - Niobium

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Austria - 25 Euro
Year: 2016
Series Silver Niobium Coin Series
Theme: Time 
Composition: Silver-Niobium 
Fineness: 0.900
Weight: 16.5000g
KM# 
Quality: Special uncirculated FC
Diameter: 34mm
Mint Münze Österreich
Mintage: 65.000
Delivery 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.