[Below: This is a cool high value (10 Reichsmark) stamp that was loose within the booklet. Celebrating Gau Tag (Koblenz/Trier districts), June 26-28, 1936. Koblenz is said to be one of 'Germany's oldest and most beautiful cities'. Like Koblenz, Trier is in the state of Rhineland-Palatinate, and is within the important Moselle wine region. Trier is considered to be Germany's oldest city, founded in the 4th century BC by Celts.]