It is for spare or Repairs (Faulty) as it is Locked to Apple ID. otherwise working as shown in the picture.

Brand: Apple
Series: Apple Watch Series 7
Band Material: Silicone
Network: ID Locked
Model: Series 8 41mm
Case Size: 41 mm
Operating System: Apple Watch OS
Features: GPS
MPN: 820-02635-06
Compatible Operating System: iOS - Apple