watchOS 4.1 (build 15R846) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-10-20T17:05:38Z. The update package is 566.71 MB. This is a delta (partial) update that requires 3.2.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f669eab541cc8bac0f3f4e6e4c64004dffbfb2c3.zip.