At the beginning of 1916, experiments started with a design from van Heijst & Sons. By the end of August 1916, the new helmet got its definitive form and on September 9 1916, a tender was made voor the production of 50.000 helmets at van Heijst & Sons and 50.000 liners at Pauwels.
After a few last modifications, the new helmet was officialy introduced as the Helm No.1. This helmet is more known to collectors as the m16 or model 1916.
Eventually, the m16 was produced by various manufacturers and in various models until 1928. De m16 was used by the Netherlands Armed Forces until their capitulation in May 1940.