watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-08-07T17:13:47Z. The update package is 686.13 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: fa8ef8cf4eb70c46f7b0e2e115f46d187d720a0e.zip.