Good questions, that I believe have been asked previously . . . but perhaps not answered.

On the Carrera 2447D (decimal minutes), we seem to have blue paint and black paint; flat dials and stepped dials; cut numerals and uncut numerals . . . but I have not been able to figure out the exact sequence.

Definitely a subject for further study. Perhaps one of our Carrera experts can "break the code".

Thanks for raising the questions and posting the good photos.

Jeff