After 20 August 1921 and  before 11 August 1922

Start 8 - 3inch AA guns aboard with the additional six being place aboard in August 1921.  

End an August 1922 photo, in Seattle without airplane platforms.  Only Bremerton Navy Yard periods for such removal were  3 Jan - 18 Feb 1922 and 7 - 10 August 1922.