watchOS 6.1 (build 17S5068e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-10T17:07:31Z. The update package is 261.44 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: c57964350a62710c16279b5b4cad83e6bbfbb2dd.zip.