watchOS 5.0.1 (build 16R381) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-09-27T20:08:48Z. The update package is 739.76 MB. This is a delta (partial) update that requires 4.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 66a2ecf6371fbde4d593c67f51dfe9a2dbb25e77.zip.