watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-10-23T17:11:11Z. The update package is 323.33 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: d61389a36407584e32f293dae8d688cae8981c0d.zip.