Values are based on the actual condition, finish, box, papers, accessories, whether any modifications have been done to it since it left the factory. It is basically impossible to put a value on any firearm with just the caliber and model you have provided. You could be in the 50-500 USD or more range. A hands on evaluation is needed. Check out completed on line auctions or gun store/estate sale/garage sales/pawn shops and as many books as you can to get knowledge.
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 value,but both Colt police positive special and police positive .38 were produced in 1910.
Don't know the value, but a Colt police positive special with that serial number was made about 1919.
Don't know value, but made about 1913 for police positive special
Colt police positive .38 was made in 1919 and Colt police positive special was made in 1914.
Your colt police positive special was made in 1972.
100-500 USD
about 1929
150 or so
about 1973
You will have to call Colt to find out.
value depends on overall condition..............