watchOS 5.2 (build 16T5191d) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-02-04T18:13:42Z. The update package is 456.62 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: b9c22047707dac4c077c579fbbef0922a6e6d578.zip.