It seems to be confirm the version number of Windows 10 creators update is 1703

The version number water maker on the desktop bottom right corner is change to "Windows 10 Pro" on this release (15055). The previous build still show "Windows 10 Pro Insider Preview"

And also, The version number have been change to 1703. So the creators update is version 1703.

It seems to be confirm the version number of Windows 10 creators update is 1703