Introduction
Are you unsure of which Apple Watch you own? If you are looking for repair information or replacement parts you need to know the series and model number.
Tools
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            To find the series of your Apple Watch... 
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            Turn the watch over so that you're looking at its back cover and the screen faces away from you. 
 
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            To find the model number of your Apple Watch... 
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            Remove the wristband from the watch. Press the button on the back case to slide the band out. 
 
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            If you can't read the engraved text on the watch or don't want to remove the band, the model number can be found in iOS settings. 
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            Open the Watch app on your iPhone and select the "My Watch" tab. 
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            Select General > About and then scroll to the "Model" field. A number will be displayed as a combination of letters and numbers starting with “M”. 
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            Tap the "Model" field. You should see the model number which starts with “A” (e.g. A2473). 
 
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            Model Numbers 
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            A1553 (38mm) 
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            A1554 (42mm) 
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            The back cover is composite, with "Composite Back" and “7000 series” text written on it. 
 
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            Model Numbers 
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            A1802 (38mm) 
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            A1803 (42mm) 
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            Apple took their original Apple Watch, slapped in a faster processor, and called it the Series 1. 
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            Composite back with 'Series 1' written on it. 
 
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            Model Numbers 
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            A1757 (38mm) 
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            A1758 (42mm) 
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            A1816 (38mm) 
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            A1817 (42mm) 
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            Similar design to previous models but with the addition of built-in GPS. The back cover is ceramic, with 'Ceramic Back' and 'Series 2' written on it. 
 
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            Model Numbers 
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            A1858 (38mm GPS) 
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            A1859 (42mm GPS) 
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            A1860 (38mm GPS + Cellular) 
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            A1861 (42mm GPS + Cellular) 
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            Apple introduced a red dot on the Digital Crown if a GPS + Cellular model. 
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            GPS-only models: the back cover is composite, with 'Composite Back' and 'Series 3' written on it. 
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            GPS + Cellular models: the back cover is ceramic, with 'Ceramic Back' and 'Series 3' written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A1977 (40mm), A1978 (44mm) 
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            GPS + Cellular 
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            A1975 (North America, 40mm), A2007 (Europe, Asia Pacific, and China mainland, 40mm) A1976 (North America, 44mm), A2008 (Europe, Asia Pacific, and China mainland, 44mm) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Features a thinner body compared to the previous series. 
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            The back cover is black ceramic with 'Series 4' written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2092 (40mm), A2093 (44mm) 
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            GPS + Cellular 
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            A2094 (North America, 40mm), A2156 (Europe, Asia Pacific, and China mainland, 40mm), A2095 (North America, 44mm), A2157 (Europe, Asia Pacific, and China mainland, 44mm) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Similar design to Series 4, but introduces the Always-On display. 
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            The back cover is black ceramic, with 'Series 5' written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2351 (40mm), A2352 (44mm) 
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            GPS + Cellular 
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            A2353 (North America, 40mm), A2354 (North America, 44mm), A2355 (Europe, Asia Pacific, China mainland, 40mm), A2356 Europe, Asia Pacific, China mainland, 44mm) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Similar design to Series 4 and 5, but lacks the Always-On display. 
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            The back cover is ceramic, with 'SE' written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2291 (40mm), A2292 (44mm) 
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            GPS + Cellular 
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            A2293 (North America, 40mm), A2294 (North America, 44mm), A2375 (Europe, Asia Pacific, China mainland), A2376 (Europe, Asia Pacific, China mainland) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Very similar design to Series 5, but introduces a Blood Oxygen sensor. 
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            The back cover is ceramic, with “Series 6” written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2473 (41mm), A2474 (45mm) 
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            GPS + Cellular 
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            A2475 (North America, 41mm), A2477 (North America, 45mm), A2476 (Europe, Asia Pacific, China mainland, 41mm), A2478 (Europe, Asia Pacific, China mainland, 45mm) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Very similar design to Series 6 with the Blood Oxygen sensor. 
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            The back cover is ceramic, with “Series 7” written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2770 (41mm), A2771 (45mm) 
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            GPS + Cellular 
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            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) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
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            Very similar design to Series 7 with the Blood Oxygen sensor. 
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            The back cover is ceramic, with “Series 8” written on it. 
 
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            Model Numbers 
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            GPS Only 
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            A2722 (40mm), A2723 (44mm) 
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            GPS + Cellular 
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            A2724 (Europe, Asia Pacific, 44mm), A2725 (Europe, Asia Pacific, 40mm) 
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            A2726 (North America, 40mm), A2727 (North America, 44mm) 
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            A2855 (China mainland, 40mm), A2856 (China mainland 44mm) 
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            GPS + Cellular models feature a red ring on the Digital Crown. 
 
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            Model Numbers 
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            A2622 (North America, 49mm) 
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            A2684 (Europe, Asia Pacific, 49mm) 
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            A2859 (China mainland, 49mm) 
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            The crown has an orange ring on it. 
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            It is a larger and more rugged watch than previous models and can be identified by “Watch Ultra” written on the back. 
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            There are 4 visible pentalobe screws on the back. 
 
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- If you see a red dot, red ring, or orange ring on the Digital Crown you have a GPS + Cellular model.
- You can find the model number by removing the wrist strap or in the general iOS settings.
- You can find the series on the back of the watch.
- There are special Hermès and Nike versions of most of these watches which can be identified by their logos.