watchOS 6.0 (build 17R5571a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-21T17:10:46Z. The update package is 407.79 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: 5cc15e27db0e3cc4f151054b6419cf658c8675d7.zip.