My guess would be 2015 ish.
The newer 2016 serial numbers appear to start with 87xxxxxx, and also you appear to not have the newest clasp (and bracelet?) revision.
I nearly pulled the trigger on a .005 that had all the same other bits as yours (bracelet, paper weight, 778xxxxx, etc) that was stamped May 2015.
Does mean they've had the text fixed for longer than I thought though, but that's a good thing.
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