watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-10-02T17:10:57Z. The update package is 686.44 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: aee77336b3eec84ab047b90be1d8e6b39faa0d99.zip.