watchOS 5.0 (build 16R5322d) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-07-17T17:11:27Z. The update package is 661.98 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: 98d5aa9b08a5e202a2486b756189745615116383.zip.