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Very interesting, albeit possibly it is only for these matching sets?
I checked two of the pieces that passed through me and the difference is random for each, 102xxx for one and something similar for the other. Please excuse me as I do not want to disclose the difference 
Lange 1 Onyx Dial Sets - Observation (and Question)
This is interesting (but maybe only to me -- we'll see). When Lange relaunched in 1994, they began numbering casebacks starting with 110001 and movements starting with 1. So we typically saw a difference of about 110000 between the caseback number and the...
Interesting...
I don't have an Onyx to help out but did find that tidbit about the 110000 difference interesting as I looked at the caseback of my late L1 "Darth" and there it was (or close enough anyways, 112k) Do you know of any reason why cases started at 110000 and ...
I believe case serial numbers started at 110000 because Lange had made some indeterminate number of watches before then, since the 19th century.
I don't recall exactly why they picked 110000 though.
Yes, this is my understanding too, CR.
It's actually a dynamic I've had interest in too over the years. Lange's cases are currently produced by four different partners (FT, CO, SUG & db). For Limited Editions, I imagine Lange Uhren could specify the case numbers - but for production pieces I u...
Very interesting, albeit possibly it is only for these matching sets?
I checked two of the pieces that passed through me and the difference is random for each, 102xxx for one and something similar for the other. Please excuse me as I do not want to disclose the difference