watchOS 5.0 (build 16R5349a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-08-13T17:06:45Z. The update package is 249.75 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: bb0c5e34675cd44ee8b2989e806d0d172d69e056.zip.