Introduced at SIHH 2015, the reference. 191.025 represents a new chapter in the history of Lange's icon - the Lange 1. It is powered by the newly conceived L121.1. It's looks remained highly unchanged compared to the original model, although the bezel is slightly smaller.
Apart from familiar hallmarks such as the twin mainspring barrel with a power reserve of 72 houres, the 2015 calibre L121.1 has an escapement featuring a balance wheel with eccentric poising weights as well as a freely oscillating balance spring crafted in-house. Beneath the hand-engraved balance cock, the balance beats at a frequency of 21,600 semi-oscillations per hour and assures high rate accuracy.