watchOS 6.0 (build 17R5491t) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-06-03T19:28:24Z. The update package is 655.82 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: 9865a1794ed3e90f567356c7db6b28ee6facad02.zip.