watchOS 6.0.1 (build 17R605) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-09-30T17:15:37Z. The update package is 713.56 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: e1a994ff0394006292621efd2addd02636ade352.zip.