1980 Panerai Prototype designed by Alessandro Bettarini (now of Ennebi) and commissioned by the Italian Navy. It never went into production. The Ennebi Fondale and Decima Mas Strumento share its case design. The only difference is they were unable to use Panerai's patented crown locking device.
Its 47mm titanium case is water-resistant to 1000m. This is the one and only, so obtaining one is impossible, however I plan to get an Ennebi Fondale one day. It will make an excellent substitute.
oceanictime