colts pistols of this era are percussion style, about $150 to $750 depending on condition, rough, fair, good , to excellent.
value depends on overall condition...........
100-400 USD
Revolver or semi-auto?
32/20
Don't know the value,but a Colt police positive .32 with that serial # was produced in 1908. Or, 1909
32/20
colt 357
if it's a revolver......32 cal revolver ammo if it's a pistol......32 cal pistol ammo
it was made about 1907........................
about 1892
any 32 cal. revolver ammo.
Proofhouse.com has Colt serial number tables.