I understand your desire and need for bracelets, I completely empathize. But the 1815 Chrono, a watch I really love, needs to be on a strap, IMHO. From the photos I have seen, it just does not look right on a bracelet, especially the one that Lange would provide for this model. As someone else said, the Dato bracelet looks better, but it still would not be great on the 1815. Again, all just my opinion.
Ah, but that 1815 Chrono, particularly the old version, is one of my two favorite Langes and probably the one I would get if I were to go for a Lange. Great minds think alike, right? ;-)
Good luck with your decision, Goh. It would make a great addition to your collection.
respo