We follow the condition guide similar to Chrono24.
Unworn
Mint condition, without signs of wear
From old stockpile, may have minimal signs of wear from storage
Very good
Worn with little to no signs of wear
Glass, hands, dial, case, and movement in very good condition
Movement serviced to an adequate extent, running very good, may by under factory warranty
May have been polished
Good
Light signs of wear or scratches
Glass, hands, dial, case, and movement in good condition
No large dents. No hair-line cracks.
Movement potentially serviced
May have been polished
Fair
Obvious signs of wear or scratches
Fully functional
Glass may have been replaced
Small dents
May have been polished
May contain non-original spare parts
Movement may require servicing
Poor
Heavy signs of wear or scratches
May not be fully functional
Case heavily dented
Dial, hands and/or glass need replacing
May have been polished
May contain non-original spare parts
Incomplete
Components missing, non-functional
Suitable only for retrieval of spare parts
May contain non-original spare parts