The Kleine Lange 1 Moonphase was introduced at SIHH 2017. The inaugural model, reference 182.030, has a pink gold case and a guilloched, argenté-coloured dial. At 36.8mm the case is 1.7mm smaller than that of the 'regular' Lange 1 Moonphase. It is powered by the hand-wound caliber L121.2. The present ref. 182.830 is similar, but fitted with a diamond-set bezel.