watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-08-27T17:29:03Z. The update package is 684.84 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a8e01b6c68f2cf3caead4da7996068f0c3a8e853.zip.