watchOS 5.0 (build 16R5360a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-08-24T17:14:08Z. The update package is 262.35 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a2100aa5e6a42c888cca97b784570b96c88787ad.zip.