watchOS 6.0 (build 17R5507l) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-06-17T17:11:05Z. The update package is 665.15 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: d21d1b1dcfb9130096f43a39110c43925d0bb6eb.zip.