This video offers a comparison between the A Lange Sohne Datograph and A Lange Sohne 1815 Chronograph
A. Lange & Sohne 1815 Flyback Chronograph (414.026) manual-wind watch, features a 39.5mm 18k rose gold case surrounding a black dial on a black crocodile strap with an 18k rose gold deployment buckle. Functions include hours, minutes, small-seconds and flyback chronograph.
