watchOS 5.3.2 (build 16U611) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-09-26T17:09:37Z. The update package is 133.31 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b1980e5543148086a4027cef1dc9eab44a84acf5.zip.