You have a very nice taste for your watches, this is a real pleasure admiring them, aside from the usual stream.
As Dr.Kol said, the RO is 50m waterproof whereas the 3800 is 120M, be careful when you use them underwater. Usually the 30/50m label is not for swimming (ask an AD if you need confirmation).
And even with a 120M, the seal must be checked and change from time to time (ask your AD to make a check).
Thanks for sharing JC!
Cheers, Mark



