His collection was documented by the curator Jan Piet Puype who discovered that he had all of the very rare and important examples of ivory pistols in his collection (there were only 52 worldwide).

The Family collection is worth about $150 - $200 million and resides in the Rijksmuseum and the National Military Museum.

Henk Visser (Hinderikus Lucas Visser) was born in Groningen and became involved in the Dutch resistance during World War II when he was still in High School.

[1] After the war he went to work for a munitions factory, De Kruithoorn in Den Bosch (Netherlands), and traveled to Russia and Indonesia, where he began his collection of arms and armory.

He later became an independent arms dealer, the largest one in the middle east.