watchOS 4.3.2 (build 15U5053b) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-05-30T17:06:37Z. The update package is 60.15 MB. This is a delta (partial) update that requires 4.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 86288b9bd95474aa605cfd2077444d4639943ba8.zip.