watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-23T17:10:33Z. The update package is 723.79 MB. This is a delta (partial) update that requires 5.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b0bd65c43847a953aa3da2e4bd2f519d57c6b88b.zip.