watchOS 5.0.1 (build 16R6381) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-09-27T20:09:08Z. The update package is 340.23 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: 5460ad22a0f155ead5865fa77ec860bccafb29c6.zip.