GenTLe 1,511 Posted December 29, 2014 I've read around about the fact that the 7750s are not shock proof, while the 28xx are. I'm not getting exactly what this means, because they both have shockproof jewels on the balance, as like as they are both attached to the dial/case in a similar way. The only difference is that the chrono are much more complex than the 28xx ones... Can some watchmaker put some light on this? Thanks, GenTLe Share this post Link to post Share on other sites
