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 373.25 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: dc20b312d62cba9be30ca22e68029970da37433e.zip.