watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-10-02T17:11:02Z. The update package is 235.43 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cc894b51508b7b4d5fc847644b8a6e1620643588.zip.