How about this:
My watch is tested as follows: CH 0; CB 0.4; 9H 0.6; 6H 1.6; 3H 1.4; 12H -0.6
After a 12-hour day, my hand spends 90% of time at crown left 6H position (fastest position), and equal time at crown down 9H and crown 3H positions (fast position), and no more than a min at crown right 12H position (the only slow position).
So, according to this test, and my record of my movements, the watch should certainly run fast and in no way run slow.
But only after 12 hours, it's already -1.5 sec. Either the test is wrong or the watch is wrong.
Temperature 10C/50F, no rain no moist no nothing just a boring sunny day. no sudden movements. Any external influence can not be more ordinary.
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