watchOS 5.1 (16R5577c) for Apple Watch Series 1 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
potential future use. They might also be useful if you're doing research.
Release Date October 9, 2018 Upload Date October 5, 2018 Filename 691d05585e96e39538d87171315cf48de43a5911.zip Filesize 1.3 GiB Identifier Watch2,6
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