From stout steel to refined leather, the season’s latest complications are destined to become classics.

1955_ALS_421_032_Blue_Moon_2014_a6

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A. LANGE & SÖHNE "Once in a blue moon," usually refers to something especially rare. Well, this brand's 1815 Rattrapante Perpetual Calendar is one such timepiece, as it is one of several A. Lange & Söhne moon-phase watches that does not need to be adjusted (as others do) when that blue moon does occur. No small feat in watchmaking, to be sure. Price upon request