The Little Lange 1 Moon Phase 182.830 is the diamond-set version of the Rose Gold model, its bezel set with brilliant-cut diamonds around a Silver dial made of solid gold and decorated with guilloché. Introduced in 2017, it places a moon phase inside the small seconds of the 36.8 mm Little Lange 1, the smaller sibling of the asymmetric Lange 1 that A. Lange & Söhne presented in Dresden in 1994. A plain-bezel twin exists as the 182.030.

Rose Gold hands and solid-gold appliques read against the guilloché dial, which keeps the full Lange 1 arrangement: off-center hours and minutes, the outsize date in its double window, the power-reserve scale and the moon within the subsidiary seconds. The Rose Gold case measures 36.8 by 9.5 mm, its sapphire back showing the hand-wound movement that the Little Lange 1 shares with the Lange 1, and the nacre white alligator strap closes with a Rose Gold prong buckle.