I've got a EMII COSC that is developing some kind of corrosion or rust on the hour hand. Alternately it could be the finish is flaking off. I can't quite tell and I don't have a loop or anyway to see it up close. I don't dive or wear the watch in the shower. I've never seen moisture form on the inside. Could this be caused by grease? It almost looks like it's starting at the center and working it's way out? I did recently take a 3500 mile motorcycle trip and I did wear the watch during the ride. I've got a newer bike so it doesn't vibrate much but maybe that was enough to cause this? I bought the watch from Topper (used) and emailed them. Hopefully they can help me out. Anyone had this happen? I attached an image...I think. I have a hi-res version too.