U boat watch flightdeck 50 lussuria as an addition to the admirable flightdeck collection the u boat lussuria bears a 50mm stainless steel case with a streaked pattern to its surface creating an eye catching finish the 019 carat diamond which has been etched into the thick smoked sapphire crystal glass creating visible cracks on the internal surface the u boat flightdeck 50 lussuria watch is finished on a beautiful vintage strap which has been hand made and hand finished with a mixture of b