watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-23T17:10:30Z. The update package is 723.79 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: 96e7c6a941ce9249553fe0246c9d0a36e604e1f3.zip.