Interestingly, the watch's papers mention ref. 101.027X, the "secret reference" L1 with a white gold case
link and silver dial (secret because Lange never publicized it), and not the typical steel Lange 1 ref. 101.026. The entire package is an interesting piece of Lange history, but in the end, a steel Lange
link 1 is a steel Lange 1, which is to say an extremely rare watch—most estimates
link put production at about 30 pieces.