watchOS 5.2.1 (build 16U113) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-05-13T17:16:01Z. The update package is 465.54 MB. This is a delta (partial) update that requires 5.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fc8a7a5bc823055bd1ebd3d977046a8ef367d038.zip.