made about 1914........................ I disagree. Colt first produced the Official Police model in 1930. "Proofhouse.com" says that Colt began 1935 Official Police models wih serial number 4000 and 1936 began with number 11000 so your pistol was made in 1935.
That particular colt official police .38 with serial # 569014 was produced near the beginning of 1931. ( 569000 - 572999 ) The T would possible stand for the inspector's mark. I have a colt DS from 1930 and it also has a T over the serial #.