watchOS 5.3.4 (build 16U627) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-12-10T18:22:19Z. The update package is 34.82 MB. This is a delta (partial) update that requires 5.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f65b408fc1c0d4e568040e19f7d7de434bed0080.zip.