watchOS 6.0 (build 17R5521e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-02T18:10:10Z. The update package is 725.8 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: 50e1216861286ddeac54e8cbf0fc95d08ebf06a4.zip.