watchOS 6.1 (build 17S5054e) is an official Apple over-the-air update for the Apple Watch Series 5 (44mm, LTE), released on 2019-09-23T17:05:04Z. The update package is 255.01 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2b6216ee740dac6c47e612f4adc9632dac1372fd.zip.