After months of research I finally made up my mind and went with this reference. I was so close to get 1815 Chrono black dial too, but I think 5170 is less formal. So glad I did. ...
Congratulations on making a very difficult decision. Practically twins on paper. Starting in 2013 I starting looking very closely at the Lange 1815 Chrono. Benefited from several opportunities to evaluate this reference and spent many years trying to love...
I sold my whole collection after I completed my fat loss journey. Now that I know my real wrist size π and I think I really know what I truly love wearing with this new body and life style.