watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-09-23T17:04:41Z. The update package is 686.18 MB. This is a delta (partial) update that requires 5.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d6c9867d7292e85875c6a3c247eb95dd64da9a4c.zip.