It can be any of these:

  • Apple Watch Series 3 (GPS + Cellular) Aluminum 38mm
  • Apple Watch Nike+ (GPS + Cellular) 38mm
  • Apple Watch Series 3 (GPS + Cellular) Stainless Steel 38mm
  • Apple Watch Herm├Ęs (GPS + Cellular) 38mm
  • Apple Watch Edition (GPS + Cellular) 38mm

The full list of Apple Watch Model Numbers