The present lot is one of an approximate 43 examples of a quarter repeating chronograph watches with or without a minute counter, see Martin Huber, Die Lange Liste, 2000, pp. 190-191
Lange replaced the jumping seconds mechanism with a chronograph in their basic quarter repeaters starting in 1880. They built approximately 65 quarter repeating chronographs until 1941. These differed from normal chronographs in that the chronograph function was now driven by a transmission wheel geared to the seconds wheel under the dial, as opposed to a wheel on the arbor of the fourth-wheel. The user could then engage the chronograph by "rocking" the separate transition-wheel. This construction lowered the amount of chronograph wheels needed from three to two, and neutralized the tendency of chronographs to jump forwards or back.
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