Postcard from the Netherlands!

Today I got a nice postcard from the Netherlands! The postcard shows a picture by Paul Huf of the flag of the Netherlands. The flag of the Netherlands is unique because it is the oldest tricolor flag still in national use. Variants of it had been in use since the late 16th century but it was only officially formalized in 1937 as the national flag of the Kingdom of the Netherlands. The card is an official Postcrossing card, NL-2657353. Thanks Marijke!