One uses Seiko’s unique Kinetic caliber, which, powered solely by the movement of the wearer’s body, offers both precision and security to the diver. This model uses the same two-layer case construction as the legendary 1975 model, but it does so in a modern way. The second Prospex PADI model has a case and dial design that is also a reminder of a classic, the 1970’s Seiko 150m mechanical diver’s. Famous for its unique shaped case, wide and clear hands and indexes, this watch is now widely collected and still has many admirers throughout the world. Both special models feature PADI’s characteristic red and blue color on the dials and the bezels, and the PADI logo on the dials.