watchOS 5.0 (build 16R5340g) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-08-06T17:12:13Z. The update package is 273.28 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: 662f925ba81cfefd842bb7f15087cb24d3511700.zip.