watchOS 5.0.1 (build 16R6381) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-09-27T20:09:02Z. The update package is 566.95 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: 0b52db5057590509271932b9632072d82e3e8e75.zip.