watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-17T17:42:08Z. The update package is 744.58 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: 8c155ffaa2cbb4b2abfda83cc180a503b7050145.zip.