Austria - 25 Euro - 2013 - Tunnel Construction - Niobium

Entregas para o CEP:
Meios de envio
  • WorldCoins Rua Piratuba, 1717 Sobreloja Joinville/SC
    Grátis

Austria - 25 Euro
Year: 2013
Series Silver Niobium Coin Series
Theme: Tunnel Construction
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

One of the most mountainous countries in Europe, Austria has inevitably played a vital role in the development of tunnels. The brilliant ice blue 2013 addition to our innovative 25 euro Silver Niobium series pays homage to Austria’s long and influential contribution to tunnel construction.

Opened in 1848, the vertex tunnel of the Semmering railway was the world’s first alpine tunnel. The ‘New Austrian Tunnelling Method’, which uses the geographical stress of surrounding rock to strengthen a tunnel, was developed from 1957 to 1965 and has since done a great deal to revolutionise tunnel construction around the world. A present-day tunnel boring machine features in the niobium pill of the coin’s obverse, its rotating motion symbolised by three arrows. The obverse’s outer silver ring shows the mountains through which the machine pierces. The coins reverse makes excellent use of the niobium pill to show one of the many road tunnels that pepper Austria’s alpine landscape today, while a tunnel worker uses a pneumatic drill to loosen rock in the silver ring alongside the word “Tunnelbau” (tunnel construction).