U boat watch chimera rubies mother of pearl 8034 unlike any other u boat watch this magnificent u boat chimera rubies mother of pearl watch combines some of the most exquisite gemstones alongside yellow gold and stainless steel this impressive array of materials makes up the bold 40mm case which houses the u 28 automatic mechanical movement which promises a water resistance of 100 metres and an impressive power reserve of 38 hours the bulky yellow gold case is complimented by an oversized