The high-precision special baromet ers 1500MS and 1580CRED are built to comply with the DHI specifications and have a special high-accur acy movement with large twin cells and a special front and back plate and a calibra- tion piece by piece through our workshop. Each and every piece is tested in a pressure chamber, calibrated and supplied with a works certificat e. The case is made of solid brass or alternatively of brushed stainless steel with a chromed brass upper part. A real masterpiece and a “must” for the bridge of every serious seaman.