watchOS 3.0 (build 14S326) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2016-09-07T21:33:18Z. The update package is 946.72 MB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 331e2eefb058ac721ed5d68acde327aaf320295d.zip.