watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-10-10T17:08:29Z. The update package is 723.18 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 33acc91ab7d71ab0ac64bf7bc8348bd5146a3b6e.zip.