and I am no expert when it comes to chronographs. JLC has in past helped other companies to create innovation. The big date was not new when lange came out with it. However, JLC helped them with in creating the complication. I am not bashing Lange, I just want to know if JLC helped with lange's datograph. JLC also helped cartier with its new movement.
I also would like to see JLC come out with the jumping minute counter!