watchOS 5.1 (16R591) for Apple Watch Series 1 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date October 30, 2018 Upload Date October 22, 2018 Filename 1ddaf681a6c8b2bf5b9c396f004553b1efd1daef.zip Filesize 1.3 GiB Identifier Watch2,6
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