watchOS 5.2 (build 16T5222a) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2019-03-11T17:10:56Z. The update package is 454.55 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: 937b6efb040ff926f1030a0f984b3b2e18a7f5b0.zip.