watchOS 6.1 (build 17S5059e) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-10-02T17:09:53Z. The update package is 688.73 MB. This is a delta (partial) update that requires 5.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c992fc8b82d1fba6c2851fb84a7385046439df19.zip.