watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-03-27T22:03:34Z. The update package is 996.26 MB. This is a delta (partial) update that requires 3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d100921c59898eabb7145bbda501e08b90399c88.zip.