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This is a competitive sailor’s watch known as the MEMOSAIL which provides the user with a count-down timer for a departure of their yacht within 10 minutes. The large 43.5mm. screw back case is in very fine shape with only the slightest marks from normal use. The rotor, automatic winding Valjoux 7733 movement is accurate. The striking and contrasting blue, white and yellow dial is original and very fine.