watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-10-23T17:10:47Z. The update package is 273.14 MB. This is a delta (partial) update that requires 6.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0c55a9f5d15bc406a6ce082573b41b571208e9a8.zip.