watchOS 5.0 (build 16R5340g) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-08-06T17:11:56Z. The update package is 285.62 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: 5993302abfda38b0261cd9fd4171432513131d9c.zip.