The Eurotunnel In Progress 6 Postcard Set from Series 3, wrapped in original plastic, offers a unique glimpse into the transportation theme of the post-war era. Manufactured in 1988 by the Channel Tunnel Group Limited, these original postcards feature train tunnel construction as the subject. Made of cardboard, these unposted postcards provide a historical look at the progress of the Eurotunnel project, making them a valuable addition to any postcard collection.