watchOS 5.3 (build 16U569) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2019-07-22T17:19:50Z. The update package is 181.2 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: 919d681befb65f7a52bc5d9446cc09262fa3fe6b.zip.