watchOS 5.3.1 (16U600) for Apple Watch Series 1 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date August 26, 2019 Upload Date August 22, 2019 Filename 2686fb7018b90af5e61bed4f9509089fa82ef921.zip Filesize 1.3 GiB Identifier Watch2,6
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