watchOS 5.3.2 (build 16U6611) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-09-26T17:09:50Z. The update package is 138.29 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 20c75ceeb376d3b7b32a2c143247ec6c01feb660.zip.