Brand New 100%
Watch that is in brand new.  

Mint 99% ~ 95%
Watch has been worn before but is close to perfect. There may be slight hairlines scratches but only noticeable upon close inspection.  

Excellent 94% ~ 90%
Watch is overall in good condition. Visible hairlines, with minor dings or dents.  

Very Good 89% ~ 80%
Watch has clear visible scratches. Case may show a few dings, nicks.  

Good 79% ~ 70%
Watch is used and will clearly need refurnishing.