watchOS 5.3 (build 16U569) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2019-07-22T17:19:53Z. The update package is 154.95 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: 590610d7eff5523d6ee3d84dedb7e1d2ed98fdd6.zip.