watchOS 6.0 (build 17R575) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-09-11T18:34:44Z. The update package is 828.44 MB. This is a delta (partial) update that requires 5.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a3d14115d6b481d14d03509dc90789b67e2082d1.zip.