watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 5 (44mm, LTE), released on 2019-10-23T17:13:02Z. The update package is 290.36 MB. This is a delta (partial) update that requires 6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e900ab2da92258ac92eec6477b9013e287c17667.zip.