,I'm in with my Seiko 5 Faux Tuna SNZF03K1 (7S36-02V0) auto movement.
Using U.S. Naval Observatory Master Clock.
No hacking
Midnight 1-1-2012, 12 sec slow
1:00am 1-2-2012, 14 sec slow (cumulative error)
12am 1-3-2012, 10 sec slow
12am 1-4-2012, 6 sec slow
12am 1-5-2012, 32 sec fast
12am 1-7-2012, 59 sec fast
12am 1-8-2012, 1 min, 8 sec fast
12am 1-9-2012, 1 min 32 sec fast
10pm 1-11-2012, 2 min 5 sec fast
12am 1-31-2012, 7min,15 sec fast (What a disapointment)
Max