re: Watch gurus of the OT: I keep killing seikos

You should almost have to try to kill a 7s26. Without an autopsy on the two that died without water being the cause, it is hard to say but repeated sharp impacts are one of the things mechanical watches don't like, hammering, golfing along with the high-frequency drone of motor and bicycling. There is anecdotal evidence that all of those are bad and all of those are fine also.

The lower end Seiko mechanical movements are like AK47s the low tolerances just let them run and run. There aren't may issues reported with the SKX009 just dying so it is likely something about how you wear them unless you have been very unlucky.