watchOS 5.2 (build 16T5212e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-03-04T18:10:52Z. The update package is 438.57 MB. This is a delta (partial) update that requires 5.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 36078f9b140d7eb67d98c61fa9b44a9d2968ff2c.zip.