watchOS 5.3 (16U5537b) 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 May 28, 2019 Upload Date May 23, 2019 Filename f22e7113823118b6ac91e9446005b43f60af254b.zip Filesize 1.3 GiB Identifier Watch2,7
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