watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-03-27T22:03:38Z. The update package is 470.81 MB. This is a delta (partial) update that requires 5.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 761e29bf7baeb61d253071541a87887d4a640974.zip.