watchOS 5.1 (16R5568d) 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 2, 2018 Upload Date September 27, 2018 Filename 88dfc562f19be25e9c023fa9cfa458e865cb7da9.zip Filesize 1.3 GiB Identifier Watch2,7
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