watchOS 3.1 (build 14S452) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2016-09-21T17:00:47Z. The update package is 46.82 MB. This is a delta (partial) update that requires 3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e8fbb98272f783166759955a5a1689558c678007.zip.