watchOS 6.0 (build 17R575) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-09-11T18:35:04Z. The update package is 743.96 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 029e8e9362979de1ed7481b4256cb03ee86725d8.zip.