Aquanaut is a model representing the sports casual lifestyle. Complex shapes made of highly technical case has strong, smooth lines. Also the tropical band advanced techniques and the development period of two years he was born without allergies, has the highest strength and UV resistance. Is the model was released in 1998. Here is a Japan only model Ref.5066A. Vivid blue dial and bracelet is attractive. Realized high accuracy, durability, automatic winding efficiency of Cal.315/194 is installed. Is a wonderful model. Edge of the bezel is beautiful.