watchOS 6.0 (build 17R5575a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-27T17:29:36Z. The update package is 408.02 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6e8e70025eacb3c02ce84c5b8640cf3783af12fa.zip.