sexta-feira, 1 de fevereiro de 2013

Áustria - 25 €uro Construção Túnel

Ano: 2013
Valor facial: 25 Euros
Diâmetro: 34 mm
Metal: 900/1000 Ag & 6,5gr Niob
Qualidade: UNC
Peso: 16,5gr.
Tiragem: 65000 pçs
Designer: Herbert Wähner
 

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 revolutionize tunnel construction around the world.

The coin features a present-day tunnel boring machine positioned within the ice blue niobium core. The outer silver ring shows the mountains that this engineering wonder cuts through. The reverse design shows a road tunnel within Austria’s alpine landscape. The silver ring contains an image of a worker using a drill to loosen rock. The word “Tunnelbau” (tunnel construction) appears at the base.

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