100-1000 depending on EXACTLY what you have.
Depends on condition and exact configuration. Value range in the hundreds of USD.
if your handgun is a colt police positive .38 it was made in 1911.
Don't know value,but both Colt police positive special and police positive .38 were produced in 1910.
Don't know the value but according to proofhouse.com, the Colt police positive .38 was made in 1926 & the Colt police positive special was made in 1919.
Don't know the value, but a Colt police positive special with that serial number was made about 1919.
"positive action" It was an advertising slogan, used by Colt, to help the model stand out from all the other guns being sold at the time.
about 1940
100-500 USD
A Colt 38 police positive serial no. 357606 was made in 1932 and has some worth, but value is depending on overall condition
made about 1904. In 32 cal. value depends on condition
about 1926
50-400 usd