The Everett Athletic Club, located at 6th & Pacific, existed from 1905 to 1906. It presented boxing programs as well as being a training gym. Its inaugural card was presented April 29, 1905 at the Central Theatre. Immediately after Johnny Crowe died of injuries in the club's ring Sept. 28, 1906, the club was dismantled, and, consequently, boxing shut down in Everett for many years to come.

That looks pretty early for your SQINCIR chip, though. Maybe there was another one. Or maybe EAC stands for something else.