OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | Apple Watch Series 1 (42mm) | watchOS 3.0 (14S326) | September 7, 2016 | 948 MiB | c2092c0cf6f59dddde3957871e535095158926e5.zip |
| ✗ | Apple Watch Series 1 (38mm) | watchOS 3.0 (14S326) | September 7, 2016 | 947 MiB | 331e2eefb058ac721ed5d68acde327aaf320295d.zip |
| ✗ | Apple Watch Series 2 (42mm) | watchOS 3.0 (14S326) | September 7, 2016 | 949 MiB | ea01e500aba79e7ef9d0bdd6f763ce0c6e251068.zip |
| ✗ | Apple Watch Series 2 (38mm) | watchOS 3.0 (14S326) | September 7, 2016 | 948 MiB | d8a1ea45bc4d570d2e34e47f9aa384cc5f640f3b.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5278d) | July 5, 2016 | 911 MiB | c408dbaf5fd86a889a4e8db8ba637ae1fcd8d295.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5290d) | July 18, 2016 | 916 MiB | 1d4aa98b47e199e1f36730e46beb7108a9c632ce.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5247t) | June 13, 2016 | 907 MiB | 12659270793d5450b247ac1300dbaf92142f7734.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S326) | September 7, 2016 | 933 MiB | 70ba0f2c40bf7917cc24d6a9784855379c5f45e9.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5321a) | August 15, 2016 | 928 MiB | b52c3829a3ad724a830183f6585aa431d174ed7f.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5315a) | August 9, 2016 | 928 MiB | 6be58fd7b435ff59617c52b067e51c6cdfea83ae.zip |
| ✗ | Apple Watch (42mm) | watchOS 3.0 (14S5302d) | August 1, 2016 | 927 MiB | 26031382818e2891148a92043160e78610722800.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5278d) | July 5, 2016 | 910 MiB | eae4b879e8f24ab4c8e951d8aa1c1b8f18d4bc1f.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S326) | September 7, 2016 | 932 MiB | 5e566cfaf795592b9e830ac96837345978532b63.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5247t) | June 13, 2016 | 906 MiB | 3c89f1a6ce17746ce0e0707310a4cefcf02319be.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5290d) | July 18, 2016 | 915 MiB | 33a6ca5df0cbb9dda1c0ec847b9410664dca5c44.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5302d) | August 1, 2016 | 926 MiB | 08ef705436a408ad462d4e64211f86e8f47e468a.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5315a) | August 9, 2016 | 927 MiB | 4509ec01031fdf6533db8ed0779a7d023be6ed24.zip |
| ✗ | Apple Watch (38mm) | watchOS 3.0 (14S5321a) | August 15, 2016 | 927 MiB | 9bc05bff14875276d1a65f964825c55f357883f5.zip |