It can be any of these:

  • Apple Watch Series 5 (GPS + Cellular) Aluminum 44mm
  • Apple Watch Nike (GPS + Cellular) 44mm
  • Apple Watch Series 5 (GPS + Cellular) Stainless Steel 44mm
  • Apple Watch Herm├Ęs (GPS + Cellular) 44mm
  • Apple Watch Edition (GPS + Cellular) Titanium 44mm
  • Apple Watch Edition (GPS + Cellular) Ceramic 44mm

The full list of Apple Watch Model Numbers