watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-08-07T17:13:58Z. The update package is 340.58 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: 07be012f76f93379f15d193a49a980c8f3b32a6d.zip.