watchOS 6.0 (build 17R5532f) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-07-17T17:42:00Z. The update package is 677.44 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cca93db8e033e05521c95b889bbaac1c313402f9.zip.