Long story short:
Started degree A and dropped out after earning about half the credits for graduating
Started another degree B and finished it, getting also a PhD after it
Managed to finish degree A studying part-time
The fields of A and B are somewhat related, but A is more professional and B is more academic
I'm considering to apply for professional positions related with both A and B, but I'm not sure about how to present my undoubtedly relevant degree A. The problem is that from starting date to graduation date there is a time span of almost 15 years, due to a 10 years gap in the middle.
How should I introduce degree A? Mentioning graduation date only? Not mentioning degree A at all? Being completely explicit about dates and explaining the situation in case of being asked during a job interview?