Went back to the picture you posted the other day
The dial was deep blue, but these pictures show an even deeper blue in this light. Amazing dial. One small detail, correct me if I'm wrong, but the date windows are a bit thinner than the Lange big date and the numbers are also thinner and more graceful. ...
It's hard to describe the blue enamel dial. In some light its blazing blue and in other light its lustrously deep and rich, but always spectacular.
I'm no Lange expert but I believe your observation on the date windows and font are correct. Thanks for looking. M4
