watchOS 5.3 (build 16U569) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-07-22T17:21:05Z. The update package is 467.93 MB. This is a delta (partial) update that requires 5.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ecd64363a79c60389dbac92a80eaadcbb712e2d2.zip.