watchOS 5.3.2 (build 16U6611) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-09-26T17:09:39Z. The update package is 133.31 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: 628a98c33ece8de63d3099ab7d582a1668872a5d.zip.