watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-03-04T18:10:47Z. The update package is 470.35 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: 3f0f6d0ac1259d4885c45ae7c19bf58635b371c9.zip.