watchOS 5.0 (build 16R5283r) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-06-11T17:07:22Z. The update package is 575.38 MB. This is a delta (partial) update that requires 4.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4ffd9deec27e77740ae0a7491cb42bef6d0c1349.zip.