1978-AUSTRIA-COPPER MEDAL STRUCK WITH THE OCCASION OF COMPLETION OF THE BUILDING THE ARLBERG TUNNEL :

The Arlberg Road Tunnel with a length of 13.976 kilometres (8.684 mi), is Austria's longest road tunnel. When it was inaugurated, it was the longest road tunnel in the world. The tunnel is 1,318 metres (4,324 ft) above the sea level with the road above the tunnel having an elevation of 1,793 metres (5,883 ft).It was built between July 1974 and December 1978.

THE COPPER MEDAL MADE BY THE VIENNA MINT  IS 43 MM. IN DIAMETER AND IS IN EXCELLENT  CONDITION AS SHOWN IN THE PHOTOS.