This prototype H2O Kalmar FixedBezel has been constructed from a single block exotic material, so exotic that it has yet to have been used for the construction of anything I have come across let alone a 3000m dive watch.
Its fantastic wood grain effect is the result the metal's highly specialized forging process. H2O continue to innovate with their use exotic materials and will introduce two extremely limited watch series in February. Stay tuned for more . . .