watchOS 5.2 (build 16T225) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-03-27T22:03:27Z. The update package is 812.72 MB. This is a delta (partial) update that requires 4.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a6029b8899ca8109d4e315d1a2b196383ffcd27f.zip.