watchOS 5.3 (16U5545c) 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 June 11, 2019 Upload Date June 6, 2019 Filename c927f451a6d6dea8378b8e094c1ceb09effcd715.zip Filesize 1.3 GiB Identifier Watch2,7
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