watchOS 5.0 (build 16R5334f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-07-30T17:10:00Z. The update package is 655.46 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: fa597aac0e49a136fb5ecbd1e4dd41f052ca0744.zip.