watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-10-02T17:10:59Z. The update package is 388.63 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: cb369be50246fd0bb394d463e7b367b97adee8da.zip.