Heuer Solunar Ref 279.603 Tropical DialWe are offering this very rare and unusual Solunar by Heuer. The Solunar theory comes from the work of John Knight who devised a system based on the sun (SOlar) and the moon (LUNAR) for tracking the activity of animals for hunting and fishing . The super cool black and silver bezel shows the tide position and the rotating internal bezel has a two week reading allowing the monitoring of tidal patterns of a fortnight. The 45mm steel case is in excellent