The Colt Police Positive Special with that serial number was made in 1936. Police Positive .38 was made in 1911.
Depends on which police positive with sn 134551: Colt police positive special -1916 Colt police positive .32-1916 Colt police positive .38-1921
That Colt police positive special with serial # 594826was manufactured in 1951.
Colt police positive special with that serial number was made in late 1922.
You can find out at Proofhouse.com in the Colt tables.
1964
About 1929. for a police positive special and 1935 for a police positive .38
1908
Manufacture date of 38 Colt Police Positive - Serial # 39356?
1960
1921
About 1919 or 1920.
1911