watchOS 5.1 (16R5559d) for Apple Watch Series 1 (42mm) ✗ 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 September 18, 2018 Upload Date September 14, 2018 Filename d31eb12fda20fe1c95aaf20ee8379b700c7c6c89.zip Filesize 1.3 GiB Identifier Watch2,7
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