watchOS 5.1 (16R5584a) for Apple Watch Series 1 (42mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date October 15, 2018 Upload Date October 11, 2018 Filename 6e7da5b4843a701114d4fdae897c201dd1e94c9d.zip Filesize 1.3 GiB Identifier Watch2,7
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