First of all, thank all of you for the kind words.
I tested the accuracy of this watch on my wrist for three days (3X24hours excluding shower time) and wound it every 24 hours. I set the watch according to the time shown on television (same channel) and compared these two every 24 hours. The results are:
1. in these 72 hours, the watch accumulatively run 13 seconds behind the time shown on television
2. Quite consistently, in each 24 hours of these three days the watch run 4 seconds behind the time shown on ttelevision.
The result is satisfactory, although slightly below my expectation as my other "non-chronometer" GO watches can also achieve this level of accuracy. As this watch runs behind "standard time" consistently, I believe a proper adjustment back to GO can improve the result.
My test was not conducted in a "scientific" way so the above test is merely a reference. I look forward to hearing comments and wrist expereinces from all of you.
Best
Zhiming