Delma Watch Shell Star Decompression Timer Steel 41701.670.6.154. Delma watches ability to deliver innovative and reliable timepieces has always been a result of a dedicated team. To ensure Delma stay up to date with the latest developments in the industry, thier skilled personnel are continuously trained and new equipment is introduced. Together Delma are able to consistently produce timeless watches that evolve with the demands of our clients and our collaboration with exceptional partners.