Neptunus was founded in 1937. During a walk on the beach along the Dutch coast, Anton Eilers found a sea chest that had washed ashore. Once home, he opened this crate and found it contained a tent. He erected the tent and invited the whole Neighbourhood to a big party. A resounding success, he decided to rent out the tent from now on. He set up a company and named it after the trident on the lid of the washed-up box