watchOS 5.3.7 (build 16U674) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2020-05-18T17:31:37Z. The update package is 51.02 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: fe7c3fd32aecef638965c46ee68a0c8019829578.zip.