What is The Model Number of Apple Watch Series 4 (GPS)

Apple Watch Series 4


To find your case size and more information, check the engraving on the back of your Apple Watch.

Apple Watch Series 4 (GPS)

40mm case (Model: A1977)
44mm case (Model: A1978)
Space gray, gold, or silver aluminum
Ion-X glass, Retina display, and a ceramic back