watchOS 6.1 (build 17S5076a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-10-16T17:12:45Z. The update package is 591.77 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: c6432988587e4e016ee369889343d036593ca7eb.zip.