hondas2000 0 Posted January 3, 2017 hi. guys i have a rolex comex ref.1680 from BP factory i want to replace the plexi crystal by a sapphire crystal can you help me to find this part. regards. Share this post Link to post Share on other sites
jdog 1 Posted January 3, 2017 (edited) If your case is truly a 1680, not aware a rep comex 1680 was ever made, your only choice is a plexi as a sapphire was not made to fit it. Your choices would be a 25-25 (Top hat or service) or a T19 if you prefer no cyclops. Edited January 3, 2017 by jdog Share this post Link to post Share on other sites