watchOS 5.1 (16R5577c) 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 9, 2018 Upload Date October 5, 2018 Filename 6c7cbaeb92bd70203223cb2889a81bad8355b9b0.zip Filesize 1.3 GiB Identifier Watch2,7
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