watchOS 5.0 (build 16R5313d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-07-03T17:11:36Z. The update package is 276.15 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: d9778d51b47dd0b0bba791ab574543bac91ad202.zip.