watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-07-17T17:43:39Z. The update package is 691.27 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: 6d1dea5732b6de88fb8b46fbb6e8e3c4c3dca96a.zip.