OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | Apple Watch Series 2 (38mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | dd808f45023ebfb3cb65e1e38141fd6d945c3650.zip |
| ✗ | Apple Watch Series 2 (42mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | 5bbcc7b3a6b70487cd267f7aae610f135d0057b2.zip |
| ✗ | Apple Watch Series 1 (38mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | e4ad8f15900aa1833c7c536d204e349202899cea.zip |
| ✗ | Apple Watch Series 1 (42mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | b8c2d170c2d5feea41e06f1acb1c4a65ef761650.zip |
| ✗ | Apple Watch Series 3 (38mm, LTE) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | f874fb257bc4ea8aaac414ad6bbbabacb49a99ed.zip |
| ✗ | Apple Watch Series 3 (42mm, LTE) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | e3b3b29db53229343eace1fd1894d2376514cb86.zip |
| ✗ | Apple Watch Series 3 (38mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | e5fea78fb79b2f1cfec36c5c8a933b62ec8a2e41.zip |
| ✗ | Apple Watch Series 3 (42mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | 00cef3f7df262815447fe20067b6afca71f02a3b.zip |
| ✗ | Apple Watch Series 4 (44mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | 487dabb5547685412cae936ab4f0724af931050a.zip |
| ✗ | Apple Watch Series 4 (40mm) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | 9acb94ff364f7b28e8e80a0a967aa0291ea284b2.zip |
| ✗ | Apple Watch Series 4 (40mm, LTE) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.4 GiB | 19c462faf582d35bace46ed4eb82e2239e3084cf.zip |
| ✗ | Apple Watch Series 4 (44mm, LTE) | watchOS 5.3.8 (16U680) | July 15, 2020 | 1.3 GiB | c4e822153854908e35135880236207153b5b6313.zip |