Please be advised that the information provided here is approximate, and should not be relied upon for legal, compliance, valuation, or other purposes which require definitive documentation. Enter the serial number, without. Webmar 18, 2019 · i have a police positive 38 that i would like to date. It has a serial number on the frame underneath the cylinder that is 5 digits with a single digit below it. Webapr 5, 2009 · the police positive special differs from the police positive in having a longer frame opening and cylinder…