Correct lift angle for Lange 1 with L901.0 movement
Dear fellow WIS, Am currently in the process of gauging the condition of my watch collection, including my Lange 1 pictured below. Rate and beat error are fine but amplitude seems a bit low at 268 degrees given that the watch was fully serviced last year....
Try 56 degrees and see what happens. Info I got several years ago...
I wrote this note to myself in 2020 after asking a Lange contact this question: "The standard lift angle on most Lange movements is 56 degrees. The lift angle on the Lange movements with bigger balances (such as the Datograph, Zeitwerk, and new 1815) is 4...
Many thanks CR, I tried 56 for the lift angle and the amplitude rose to a healthy 290 degrees !
My Datograph (1st gen) gave an amplitude of 340 degrees at 41 degrees lift angle, which seems quite high (rate and beat error were exemplary, however, and the timegrapher lines were flat so probably all is well).
