Model Numbers

GPS Only

A2770 (41mm), A2771 (45mm)

GPS + Cellular

A2772 (41mm North America), A2773 (41mm Europe, Asia Pacific), A2774 (45mm North America), A2775 (45mm Europe, Asia Pacific), A2857 (41mm China mainland), A2858 (45mm China mainland)

GPS + Cellular models feature a red ring on the Digital Crown.

Very similar design to Series 7 with the Blood Oxygen sensor.

The back cover is ceramic, with “Series 8” written on it.