watchOS 5.3 (build 16U5569a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-07-16T17:14:11Z. The update package is 92.51 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: 0e01415491e4050a888c1fb9f676dd73c16a69b6.zip.