watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-07-17T17:42:20Z. The update package is 728.16 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6e3bed5fbc7c2620cfcfdff2124ed215c37363c4.zip.