I'd vote to keep an eye on it for for a while before sending it to RSC. The day I received my
Sub, I placed it on the timegrapher and got a reading of -3sec/day. I was concerned because of course that's outside of specs. After daily wear for 2-3 weeks, it was reading -.5 to .6sec per day where it remains. I'm not sure if my initial measurements were on a partial wind or something but nonetheless it's fine now.
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