A. Lange & Söhne Lange 31 (2017)
![A. Lange & Söhne Lange 31 (2017)](https://watchprofessoracademy.com/wp-content/uploads/2023/03/18013991_1762616920715862_7797123782807650304_n_17860759186102471.jpg)
Power reserve of 31 days (“monats” in the monats-werk text on the dial means “month” in German) 45.9mm 18K white gold case. Patented constant-force escapement. Gary dial, limited to 100 pieces. Manually wound L034.1 manufacture movement. Priced at 142,300€