Official card, from The Netherlands...first from there :)
Den Helder is a municipality and a city in the Netherlands, in the province of North Holland. It occupies the northernmost point of the North Holland peninsula and is home to the country's main naval base.
The area began to be called Helledore ("Gate to hell", later on Den Helsdeur), because of the "hellish" fortifications that prevented enemy ships from sailing into the Zuyderzee. The name Helder may also have come from Helle/Helde, which means hill or hilly grounds, or from Helre, which means a sandy ridge.
From the entire postcard, i could only name the one with the lighthouse..it will remain some mystery what exactly the others represent...though its not hard to guess that the big picture portrays a ship...but i guess its some particular ship with name and history....and i cant name it unfortunately.
Now, the lighthouse is called Lange Jaap and was built in 1877 and is the tallest cast-iron lighthouse in Europe, at 63.45 meters.