The Apple Watch Series 9 was introduced by Apple CEO Tim Cook at Apple's 'Wonderlust' event on 12 September 2023.
Internally, the Apple Watch Series 9 is referred to as N207sAP (Watch7,1 - 41mm), N207bAP (Watch7,2 - 45mm), N208sAP (Watch7,3 - 41mm Cellular) or N208bAP (Watch7,4 - 45mm Cellular).
It was made available for preorder on 15 September 2023
and for purchase on 22 September 2023 .Application Processor
This model of Apple Watch Ultra uses Apple's A9 SiP SoC