watchOS 3.1 (build 14S464) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2016-10-04T17:25:24Z. The update package is 44.27 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: 88026d4558be97718f5db6d65ca0296f4d644784.zip.