Arnold & Son Watch Luna Magna Ultimate II 1LMM.WZ04A.C213A. The blue-green glow of the Paraíba tourmaline is the cornerstone of an exceptional creation by Arnold & Son. Luna Magna Ultimate II is adorned with PVD-treated ruthenium crystals. Encircled by baguette-cut diamonds, the dial adopts the same shade as the Paraíba, which is one of the rarest and most precious gemstones and is pavé-set on the three-dimensional astronomical moon. Luna Magna Ultimate II, a limited edition of eight pieces, takes Arnold & Son’s manufacture creations to exclusive new heights.