watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2019-09-23T17:04:21Z. The update package is 709.33 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: a69a6bff348eee7b0dbe8592eabedbfc9522380e.zip.