watchOS 5.2 (build 16T5201c) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-02-19T18:15:51Z. The update package is 471.84 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 699bc458332cac28eec7993b081da7ee3f877412.zip.