watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-08-27T17:28:56Z. The update package is 685.48 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f98a7323ec1aa6e2cbe380a148eae00fd2d0a9f5.zip.