Just an update, based on the serial numbers I've received so far, there seems to me to be an emerging pattern of serial number clustering.
Still I would like to hear about any others that come along, but particularly where your serial number is between roughly 168601065 and 168601295 I'd like to hear from you whether your band is broken or not. Every report I have so far is within that range, and most are between 1070 and 1100.
To give some perspective, KA72 has a list of about 350 GW60 serial numbers that have come through the site, so even with the reports I have it is very unlikely that your band will break. However if it is outside the range mentioned above, I have no reports of any breaks, and that accounts for 90% of the watches that have been used with ka72.com
Below is a graphic. This is a list of serial numbers from oldest at the left to newest at the right. Red bars are the serial numbers I have right now that I know for certain are broken bands. Green bars are watches I have visually inspected recently that are fine. The thicker red bars are where two consecutive serial numbers have been reported as broken.

Cheers,
Dylan.